Thèses sur le sujet « Simulation hydraulique »
Créez une référence correcte selon les styles APA, MLA, Chicago, Harvard et plusieurs autres
Consultez les 50 meilleures thèses pour votre recherche sur le sujet « Simulation hydraulique ».
À côté de chaque source dans la liste de références il y a un bouton « Ajouter à la bibliographie ». Cliquez sur ce bouton, et nous générerons automatiquement la référence bibliographique pour la source choisie selon votre style de citation préféré : APA, MLA, Harvard, Vancouver, Chicago, etc.
Vous pouvez aussi télécharger le texte intégral de la publication scolaire au format pdf et consulter son résumé en ligne lorsque ces informations sont inclues dans les métadonnées.
Parcourez les thèses sur diverses disciplines et organisez correctement votre bibliographie.
Touboul, Eric. « Simulation numérique tridimensionnelle d'un problème de fracturation hydraulique ». Ecully, Ecole centrale de Lyon, 1986. http://www.theses.fr/1986ECDL0004.
Texte intégralTouboul, Eric. « Simulation numérique tridimensionnelle d'un problème de fracturation hydraulique ». Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb376015887.
Texte intégralLabrecque, Yves. « Simulation numérique des écoulements dans une turbine hydraulique complète ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0020/MQ49029.pdf.
Texte intégralGardin, Pascal. « Approche du problème de ventilation générale par simulation hydraulique ». Vandoeuvre-les-Nancy, INPL, 1989. http://www.theses.fr/1989NAN10165.
Texte intégralProton, Antoine. « Etude hydraulique des tranchées de rétention / infiltration ». Lyon, INSA, 2008. http://theses.insa-lyon.fr/publication/2008ISAL0073/these.pdf.
Texte intégralThe detention/infiltration trenches are used to limit the flows of urban stormwater. Although they are technically and economically efficient these hydraulic works remain underused. This PhD thesis aims at overcoming some of the obstacles to their use. The study of the way experimental detention trenches work (based on the aspect of water profiles and outflow hydrographs) has allowed to improve knowledge on the hydraulic behaviour of a trench supplied by french drains. It specifically showed that the trenches filled with granular material of strong porosity (gravel 20-80) behave the hydraulic level rather as a pipe with strong roughness than as a soil. Another important result is that water exchanges between the drains and the trench body do not seem to be limited by the diffusion slits. This new knowledge has been used as a basis to build a hydraulic model to simulate the detention trenches behaviour. An original method was then defined to accelerate the ageing of an infiltration trench. This method has made it possible to observe the reduction of the structure’s infiltration capacities for an equivalent operating time of 6 years. The objective of this part of the research was to improve knowledge on trenches ageing and clogging. These results made it possible to couple Bouwer’s model with the storage model
Honnorat, Marc. « Assimilation de données lagrangiennes pour la simulation numérique en hydraulique fluviale ». Phd thesis, Grenoble INPG, 2007. http://www.theses.fr/2007INPG0121.
Texte intégralThis work concerns the variational assimilation of lagrangian data in river hydraulics, for the identification of parameters in a numerical model relying on the shallow water equations. We propose to take into account Lagrangian data such as trajectories of particles transported on the surface of the flow, in addition to classical eulerian observations which are sometimes not sufficient. The advantages of this approach to improve the identification of parameters are demonstrated through a series of numerical experiments using synthetic data as well as real data from an open channel flow where trajectories are extracted from a video. Lagrangian data assimilation for river hydraulics simulations
Honnorat, Marc. « Assimilation de données lagrangiennes pour la simulation numérique en hydraulique fluviale ». Phd thesis, Grenoble INPG, 2007. http://tel.archives-ouvertes.fr/tel-00273318.
Texte intégralBary, Benoît. « Étude du couplage hydraulique-mécanique dans le béton endommagé ». Cachan, Ecole normale supérieure, 1996. http://www.theses.fr/1996DENS0022.
Texte intégralMuller, Florian. « Etude hydraulique et statistique d'écoulements métastables en faisceaux d'assemblage REP ». Thesis, Aix-Marseille, 2018. http://www.theses.fr/2018AIXM0588/document.
Texte intégralThe analysis of fuel rod bundle flows constitute a key element of pressurized-water reactors safety studies. Indeed, an insufficient flow thermal mixing can lead to a boiling crisis, which is nefarious for the reactor safety. Numerous studies have shown the existence of reorganisation phenomena in the flow large-scale structures. This thesis work aims at improving our understanding of these phenomena, with the long-term goal of developing small-scales models suited for this type of flow. A bibliographic study has brought to light the challenges faced by simulations attempting to capture these phenomena, as well as various questions regarding their physical meaning. 3D simulations have been performed in order to study this flow ; they allowed to identify two reorganisation mechanisms for the large-scale structures consisting in a sign change for either a transverse velocity in rod-to-rod gaps or for a subchannel vortex. It appeared relevant to adopt a Taylor hypothesis in order to consider the evolution of large-scale 3D structures as transported-2D. A statistical method has then been applied to the 2D field in order to determine its thermodynamically-stable states in geometries with obstacles using the resolution of an optimization problem with a numerical calculation tool. Interesting similarities have been obtained between the PWR coherent structures and the stable states in a simplified 2D geometry. Further, 2D numerical simulations allowed to identify two different possible flow bifurcations. A parallel is drawn between these bifurcations and the two reorganizations observed in 3D simulations, laying the foundations for a physical explanation of this phenomenon
Baalbaki, Daoud. « Simulation and modeling of turbulent non isothermal vapor-droplet dispersed flow ». Perpignan, 2011. http://www.theses.fr/2011PERP1085.
Texte intégralThis thesis deals with the simulation and the modeling of a turbulent vapor-droplets two-phase flow at the local scale in the core of a PWR (Pressured Water Reactor) nuclear reactor during LOCA (Loss Of Coolant Accident). We consider a Euler / Euler two-phase flow model. This work specifically treats the modeling of the terms of transfer of momentum between the phases and the terms of turbulence. Thus, first we studied the limitations of some models used in the computer code NEPTUNE-CFD for this type of flows. Solutions were then proposed and implemented to improve the modeling of the hydrodynamics of the droplets and especially that of their turbulent dispersion. This thesis is part of a collaboration between IRSN and the laboratory PROMES in Perpignan
Mathieu, Jean. « Simulation des interactions fluide-structure en théorie des grands déplacements ». Paris 11, 1985. http://www.theses.fr/1985PA112362.
Texte intégralAn arbitrary Lagrange Euler (ALE) formulation is used to construct a method for solving the transient equations of motion of a coupled fluid structure system with free surface. A variational formulation including the incompressibility condition for fluid in a weak form is retained, so that the coupling conditions are naturally treated. This leads to a spatial discretization method using finite elements coherent in the whole system. The velocities are advanced in time by an explicit scheme while the hydrostatic pression is computed by inversion of a square matrix. A subcycling process permits a reduction of computing time when the structural stability criterion is too restrictive. Numerical results are then discussed
Beaubien, Carl-Anthony. « Simulations numériques de l'écoulement turbulent dans un aspirateur de turbine hydraulique ». Thesis, Université Laval, 2013. http://www.theses.ulaval.ca/2013/29942/29942.pdf.
Texte intégralThe work carried throughout this thesis has for objective to enhance losses predictions in hydraulic turbines draft tube. In order to acheive this, the flow in a draft tube charaterized by a sharp drop in the pressure recovery coefficient near the best efficiency point was studied. Detached Eddy Simulation (DES), an advanced turbulence modeling approach, was put to the test, in order to asses the gain attributable to a finer and more precise description of turbulent motions in this component. The numerical methods required associated to this approach, especially regarding the inlet boundary condition, were investigated. It was shown that the radial velocity profile specified at the inlet of the computational domain alters significantly the flow downstream and the predicted performance. With the measured radial velocity profile specified at the inlet of the draft tube, reasonnable agreement was found between URANS numerical results and experimental measurements of pressure recovery. However, some aspects of the numerical simulations does not agree well with experimental data. It is the case for flow imbalance between the two outlet bays. It was established that rotating flow structures underneath the runner blades require extremely fine grid and time step resolution to avoid their premature diffusion underneath the inlet plane. Nevertheless, at the studied operating point, their influence on draft tube performance was found to be very limited. DES and URANS simulations of the draft tube where axisymmetric inlet boundary conditions were imposed predicted similar pressure recovery. However, DES enables to simulate much more complex and rich turbulent motions, at a computational cost similar to the one of a URANS simulatation and with much less influence from the modeled turbulent quantities specified at the inlet plane.
Piperno, Serge. « Simulation numérique de phénomènes d'interaction fluide-structure ». Phd thesis, Ecole des Ponts ParisTech, 1995. http://tel.archives-ouvertes.fr/tel-00005618.
Texte intégralLerat, Julien. « Quels apports hydrologiques pour les modèles hydrauliques ? : vers un modèle intégré de simulation des crues ». Phd thesis, Université Pierre et Marie Curie - Paris VI, 2009. http://tel.archives-ouvertes.fr/tel-00392240.
Texte intégralUne méthode automatisée de découpage du bassin intermédiaire en sous-bassins a d'abord été élaborée afin de faciliter la construction du modèle hydrologique sur les 50 tronçons de rivière. Des tests de sensibilité ont été menés sur le nombre de sous-bassins, la nature uniforme ou distribuée des entrées de pluie et des paramètres du modèle hydrologique. Une configuration à 4 sous-bassins présentant des pluies et des paramètres uniformes s'est avérée la plus performante sur l'ensemble de l'échantillon.
Enfin, une méthode alternative de calcul des apports latéraux a été proposée utilisant une transposition du débit mesuré à l'amont et une combinaison avec le modèle hydrologique.
Tonot, Yohan. « Amélioration de l'écoulement dans un banc d'essai de turbine hydraulique à l'aide de la CFD ». Master's thesis, Université Laval, 2020. http://hdl.handle.net/20.500.11794/66693.
Texte intégralThe objetive of this project is to improve the uniformity of the inlet flow of a turbine within the test bench of the Laboratory of Hydraulic Machines, LAMH, of Université Laval. For this purpose, a numerical approach has been employed. Several numerical simulations have been carried out on the software "ANSYS CFX" and compared with one another, after validation of the simulation conditions and assumptions. A simulation using the URANS (Unsteady Reynolds Average Navier-Stokes) approach with a turbulence model k-e was first used to analyze the flow behavior in the original test bench installed in the laboratory. The validation of the model is based on a previous project giving the experimental flow behavior at certain locations in the test bench upstream a bulb turbine. The simulation showed that a major change in the configuration upstream of the turbine in the test bench would be beneficial on the effect it has on the flow. Other simulations using the RANS (Reynolds Average Navier-Stokes) approach compared several technological solutions for application in the modified test bench, which, according to the literature, would be beneficial for flow stability. The analysis of various flow characteristics higlighted two potential solutions in this situation : the installation of a curved pipe with two guided vanes upstream of the test section, or the installation of a flow stabilizer plate in a straight pipe to replace the upstream tank, upstream the turbine. This second solution is the one the LAMH put to use for its next project : Tr-Francis.
Li, Lin. « Identification des sources acoustiques induites par les singularites d'un circuit hydraulique ». Paris 6, 1988. http://www.theses.fr/1988PA066366.
Texte intégralFONTAINE, EMMANUEL. « Simulation de l'écoulement potentiel engendré par un corps élancé perçant la surface libre à forts nombres de Froude ». Marne-la-vallée, ENPC, 1996. http://www.theses.fr/1996ENPC9608.
Texte intégralFranchesquin, Nathalie. « Modélisation et simulation multi-agents d'écosystèmes anthropisés : une application à la gestion hydraulique en Grande Camargue ». Aix-Marseille 3, 2001. http://www.theses.fr/2001AIX30086.
Texte intégralThe purpose of this study is to modelise and to simulate human influenced ecosystems with a multi-agents approach. More specially it focuses on the hydraulic management of the Camargue, located at the mouth of the Rhone river on the coastline on the Mediterranean sea. This wetland is well known for the variety of its ecosystems. Furthermore, it is subject to disturbances induced by human activities, such as farming and hunting. In order to provide an overall view of this ecosystem's dynamic and guidelines to its management, we suggest to build a software model of this system and to simulate it. Our approach is based on two sub-models, interacting with each other the hydrologic model and the hydraulic management model. The analysis of the hydrologic model describes the discretisation of the selected area and the required entities to modelise water fluxes
Descantes, Yannick. « Etude expérimentale et théorique des mécanismes gouvernant l'initiation et la propagation contrôlées de fractures dans le granite de Vire par injection quasi-statique d'eau ». Lyon, INSA, 1998. http://www.theses.fr/1998ISAL0047.
Texte intégralRock fracture controlled growth is fundamental for several industries, among which dimension stone, civil engineering and oil industries. Unfortunately, controlled fracture growth is not fully achieved yet and still requires some investigation. Controlled fracture growth is related to fracturing techniques; mainly mining and hydraulic fracturing that can be considered as techniques of crack initiation and propagation from a borehole using fluid pressure loading. Consequently, a theoretical and experimental analysis of the mechanisms of crack initiation and propagation from a fluid pressurized borehole has been achieved. The analysis involved a review of previous work, conception and completion of a laboratory hydraulic fracturing testing program on granite blocks with specific instrumentation and a theoretical study of crack curvature involving anisotropy. The main experimental results are that cracks initiation and propagation around a borehole tend to be more symmetric with low injection rate, but also less simultaneous along the borehole's length. Cracks orientation seems to slightly deviate from expected plane of symmetry. With constant injection rate, cracks propagation occurs at constant or slightly increasing pressure. Crack speed control can be achieved using fine injection rate control. For a 12 mm borehole diameter with 4 mm grooves, the critical pressure lies between 7, 3 and 9,9 MPa. Maximum crack opening displacement measured during each test in several points, including points located inside the block, is in the order of a few tens of micrometers. From a theoretical standpoint, fracture curvature calculus doesn't exactly lead to the observed deviations, which are indeed very small. Nevertheless, anisotropic calculi show some sensibility to the variations of orthotropic model parameters, in the order of the observed deviations. Therefore the difference between anisotropic calculi results and observed deviations may not be significant
Machado, Luiz. « Modèle de simulation et étude expérimentale d'un évaporateur de machine frigorifique en régime transitoire ». Lyon, INSA, 1996. http://www.theses.fr/1996ISAL0063.
Texte intégralThe purpose of this work is the study of steady-state and transient behaviour of an ethylene glycol/R22 evaporator of a refrigerating machine operating with variable speed. The evaporator characteristics have been obtained from an experimental study over a wide range of operating conditions. The study in transient conditions was achieved by exciting steps of inlet and outlet refrigerant flow rates. The characteristics variations of the evaporator (gains and time constants) were deduced. A mathematical model of the evaporator was developed by using the physical laws of mass, energy and momentum conservation applied to the refrigerant, the evaporator wall and the secondary fluid. Correlations of the literature are used to calculate the heat transfer coefficients and the void fraction. The choice of the correlations is made by comparison between experimental results and the values calculated by the model. For the choice of the void fraction correlation, the refrigerating machine has been instrumented in order to determine the refrigerant mass in the evaporator in steady-state and unsteady-state. The maximal errors between experimental and theoretical temperatures are of 2 K in steady-state. The dynamic characteristics of the evaporator, determined by the model, are in good agreement with the experimental values with an error less than 10 to 15%. This error has the same magnitude order of the measures uncertainties. The model is used to stimulate the evaporator response and to determine in steady-state and unsteady-state the performances of the evaporator with R134a as refrigerant
Semsar, Yazdi Ali Asghar. « Mise au point d'une méthodologie d’évaluation et de comparaison des modèles de simulation hydraulique des réseaux d'assainissement ». Lyon, INSA, 1995. http://www.theses.fr/1995ISAL0025.
Texte intégralThe software packages of the urban storm water drainage system use different models for representation of the network hydraulic operation. These models are based on either the simple concepts of the flood wave transferring or the relations of the fluid mechanics which solve the Saint Venant equations. Considering advantages and disadvantages of every model, it seems helpful to develop the methodological concepts which permit the model designer as well as the software user to assess every model of the network simulation. The aim of this study is to introduce the general elements of comparison which allow the assessment of the performance level of a model and to define its application field. This research has directed on one band to model results comparison and on the ether band to study of the model capacity in global representation of the networks hydraulically behaviour. The main results of this research are : - Development of one model evaluation and comparison method, and putting it into practice ; - Examination of the behaviours of Saint Venant an Muskingum models of CEDRE software package; - Introduction of necessary elements which will be used in the realisation of an automatic model choosing tool. This tool will be installed in future urban drainage packages. - Supplying of necessary steps for development of the numerical results which, without any difficulty, could be considered as "correct" for set of model designers. ]
Makhsud, Abdul. « Etude expérimentale de l'instabilité et de l'émission acoustique de jets supersoniques sous-détendus : simulation en analogie hydraulique ». Aix-Marseille 2, 1996. http://www.theses.fr/1996AIX22042.
Texte intégralBouteca, Maurice. « Fracturation hydraulique calcul de propagation d'une fracture induite dans un massif rocheux / ». Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37603363t.
Texte intégralGaston, Laurence. « Simulation numérique par éléments finis bidimensionnels du remplissage de moules de fonderie et étude experimentale sur maquette hydraulique ». ENSMP, 1997. http://www.theses.fr/1997ENMP0741.
Texte intégralThis work deals with the numerical simulation of unsteady free surface flows of incompressible viscous fluids with the finite element method. In order to overcome the limitations due to both purely Eulerian and purely Lagrangian approaches, an intermediate ALE (Arbitrary Lagrangian Eulerian) formulation is proposed : at each time increment, the mechanical equilibrium (incompressible Navier-Stokes equations) is solved on the fluid domain, after time and space discretization. At the same time, a mesh velocity is computed using a regularization technique that enables to keep the mesh as near as possible to the optimum and respects the material flux. The thermal equilibrium is solved in an uncoupled way, and turbulent effects, if present, are taken into account via a standard k-Є model. The resulting filling software has been validated on various classical test cases, and succesfully compared to results of metal flows on an instrumented mould. In addition, hydraulic experiments on a transparent model have shown the ability of the present approach to describe free surface evolutions in complex geometries, such as those encoutered in casting
Borges, de Castilhos Armando Junior. « Simulation au laboratoire du comportement hydraulique et de l’évolution bio-physico-chimique d'un déchet type composite mis en décharge ». Lyon, INSA, 1988. http://www.theses.fr/1988ISAL0066.
Texte intégralBorges, de Castilhos Armando. « Simulation au laboratoire du comportement hydraulique et de l'évolution bio-physico-chimique d'un déchet type composite mis en décharge ». Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37612065n.
Texte intégralEl, Boujaddaini Mohamed Najib. « Modélisation et étude expérimentale du comportement thermo hydraulique des fluides frigoporteurs diphasiques ». Thesis, Lyon, INSA, 2011. http://www.theses.fr/2011ISAL0019.
Texte intégralThis work concerns the experimental investigation and modelling of the thermo hydraulic behaviour of a new Iwo-phase secondary refrigerant, the paraffin slurry, flowing through a rectangular channel of a heat plate exchanger type. The paraffin slurries are made of millimetric bullets of paraffin, stabilized in an organic porous polymeric matrix, in suspension in water serving as a carrying fluid. The paraffin particles used contain 75% of paraffin called NORPAR®15 and 25% of a tri-block polymer of styrene with High Molecular Weight (HMW). The experimental results generated by the heat balances on the test sections of the experimental setup built in the Thermal Center of Lyon (CETHIL), highlight an important increase of the heat transfer coefficient, due to the particles presence in the carrying fluid. For a laminar flow of the paraffin slurry in the cold channel, an average multiplication by 1 .25 to 1.5 of the global heat transfer coefficient compared to the single-phase fluid was recorded for particles mass fractions of 6 to 12%. By regression of the experimental results, correlations for the local and average Nusselt number calculation for the laminar flows are proposed. The particularity of the presented correlations is their validity in the case of a pure fluid as we\l as for a two-phase fluid containing so\id particles. A model for the hydraulic and thermal behaviours studies of a Iwo-phase secondary refrigerant fluid during its cooling in laminar flow through a rectangular channel was developed it is based on the mixture model and to king the slip velocity into account. The evolution of the experimental and theoretical values for the fluid average temperature, the heat flow which crosses the walls and the heat transfer coefficient between the wall and fluid shows good agreement and the model is satisfactory since the variations never exceed 14%
Saleh, Firas. « Apport de la modélisation hydraulique pour une meilleure simulation des tirants d'eau et des échanges nappe - rivière à l'échelle régionale ». Phd thesis, Université Pierre et Marie Curie - Paris VI, 2010. http://tel.archives-ouvertes.fr/tel-00582551.
Texte intégralNguyen, Thi-Le-Quyen. « Couplage VOF-LPT pour l'étude de l'érosion : application à l'affouillement autour des piles d'ouvrages maritimes ». Electronic Thesis or Diss., Amiens, 2021. http://www.theses.fr/2021AMIE0062.
Texte intégralStructures located in a fluvial and maritime environment undergo variable hydromechanical, physicochemical, and climatic stresses that possibly contribute to their possible deterioration. Bridge piers and offshore wind turbine foundations (monopile and suction monopod foundations) are examples of such structures. Among the resulting phenomena, local scour has been identified as one of the main phenomena resulting from the aforementioned conditions. In the United States, over the past 30 years, a thousand bridges have collapsed due to erosion-related failures. However, the factors causing this phenomenon remain a problem to be radically addressed. To numerically highlight the erosion processes mentioned above, a VOF-LTP (Volume Of Fluid - Lagrangian Particle Tracking) coupling was studied and integrated into the OpenFOAM code. The movement of particles in the LPT is governed by Newton's three laws while the movement of the fluid is locally based on the Navier-Stokes equation. The possibility of a collision between two particles is then estimated directly as a function of their positions and their relative velocity during a computational time step. The solid-fluid interaction is taken into account by the drag force and the pressure forces acting on the particles. The numerical results of dam break flows in a hydraulic channel were compared with experimental measurements of free surface profiles and flow velocities to validate the coupling between two fluid-air phases. Then, the hydrodynamics of the flow around a vertical cylinder on a semi-industrial scale was studied. In the presence of a solid phase, the trajectory and sedimentation velocity of a sphere as a function of time is compared with the experimental results obtained from the literature for different fluid viscosities. During the experimental campaign, several tests were carried out concerning the erosion of a granular bed downstream of a dam break. Three particle sizes were used to focus on the influence of the porosity of the granular bed on the depth of erosion. The numerical results have shown a good adequation with experimental results. Finally, to achieve a full-size simulation, multi-scale modelling of the scour around a vertical cylinder was carried out. The comparisons between the numerical results with the experimental data from the literature have enabled us to identify risk areas, to interpret the role of porosity, cohesion, and flow regimes
Favennec, Gwennaël. « Contribution à l'amélioration du cycle de conception du circuit hydraulique de commande d'une boîte de vitesse automatique par simulation et modélisation ». Lyon 1, 2001. http://www.theses.fr/2001LYO10043.
Texte intégralThe latest trends in the automobile world have led to the gradual replacement of traditional mechanical systems by mechatronic ones. Strong economic competition as well as market trends demands a reduction in development time. This reduction is possible today thanks to the role of computer technology and simulation in the design process. However, the integration of this particular tool cannot succeed without modelling and simulation methodology development aimed at improving the understanding of system behaviour for model authors and the different actors in the design process. A modelling strategy based on a basic elements library whose combinations allow to reconstruct most situations met in the hydraulic domain of automatic gear boxes is used. Particular attention is paid to organs taking part in the functioning of the hydraulic control distributor. Models of increasing complexity allowing to reply to different types of questions are proposed. They allow the choice of hypotheses levels sufficient for understanding and reproducing the dynamic behaviour of the regulation system of the hydraulic system
Maurice, Franck. « Intégration et mise en oeuvre de plans d’expériences numériques en modélisation et simulation système : étude de cas en ingénierie et dimensionnement des composants hydrauliques de puissance ». Thesis, Compiègne, 2019. http://www.theses.fr/2019COMP2538.
Texte intégralThis thesis has been achieved as part of the partnership between HYDRO LEDUC company and Roberval laboratory located at the "Université de Technologie de Compiègne". HYDRO LEDUC designs and makes hydraulic components such as piston pumps and motors, accumulators, cylinders and specific tools reserved for varied applications. A large amount of applications uses fluid power transmission. Indeed, because of its high power density, hydraulic solutions are unavoidable. Thus, this latter is present in various fields such as transport, aeronautical, machine tool, building industry and many others. Hydraulic circuits allow delivering considerable efforts. They enable a very accurate control of receptors and ensure a high life time to systems and components. Hydraulic pumps can be considered as the heart of every hydraulic systems. Their matchless high power density makes them to perform at high pressure while keeping a high efficiency level. Environment constraints, energy cost rise and global market have led manufacturers to make products more efficient while decreasing their manufacturing and development costs. Conventional design methodology relies on test/error cycles, which is a development strategy that can be expensive and time consuming. Computing power of computers have been increasing sharply over the last 20 years. In that sense, numerical simulation has become the mainstream in terms of design, research and development and physical analysis. The objective of our work is to gather, and analyse data and theoretical knowledge stem from many years of research investigations. From this point, the second goal of our work is to choose and develop a design strategy, which employs Design of Experiments method, and relying on numerical modelling and simulation applied to hydraulic components. This latter has been applied to a variable displacement axial piston pump. Hence, performing a design strategy that integrates Design of Experiments, numerical simulation and modelling for hydraulic components leads to reduce considerably the time and the cost of the design process
Charrier, Gregory. « Etude expérimentale des ruptures de digues fluviales par surverse ». Thesis, Aix-Marseille, 2015. http://www.theses.fr/2015AIXM4714/document.
Texte intégralFrance's embankment network stretches over 9000~km, protecting people and infrastructures. Overtopping occurs when water level rises above the embankment's crest, often leading to breach development. Reliable forecasting of breaches' characteristics (widening rate, final geometry and breach hydrograph) remains a challenging task. Furthermore, the effects of river dynamics have never been studied.This work is based on a campain of five overtopping tests performed on scaled homogeneous cohesive model embankments, carried out in an eight meters recirculated flume. The classical steps of dike breaching were observed, as wall as headcutting. Depending on soil type and water content, erosion occured at three distinct scales (sand grain, mm, cm) while the experiments' durations ranged from 1h30 to 250~h. Evidence was brought that river dynamics can result in a completely asymmetric development of both the breach and scour pit. Simple geotechnical tests showed notable differences on erosion modes and rates among tested soils, consistently with the flume experiments.The study of fixed-width breaches showed that distinguish hydraulic phenomena such as hydraulic jumps and recirculations arise when lateral flow speed increases on the river side, which comes with an important drop in breach flow.In addition, bidimensional numerical simulations offered a practical and satisfying way of modelling breach hydraulics. In particular, the strong surface deformation and important velocity gradients in the vicinity of the breach were well-rendered. Elements relative to breach formation sensitivity to erosion parameters (threshold stress and erodibility coefficient) are also provided
Hostache, Renaud. « Analyse d'images satellitaires d'inondations pour la caractérisation tridimensionnelle de l'aléa et l'aide à la modélisation hydraulique ». Phd thesis, ENGREF (AgroParisTech), 2006. http://pastel.archives-ouvertes.fr/pastel-00002016.
Texte intégralNeuhauser, Magdalena. « Development of a coupled SPH-ALE/Finite Volume method for the simulation of transient flows in hydraulic machines ». Thesis, Ecully, Ecole centrale de Lyon, 2014. http://www.theses.fr/2014ECDL0045/document.
Texte intégralThe increased use of intermittent forms of renewable energy like wind and solar energy produces fluctuations in the electric grid that have to be compensated. For this reason, hydraulic machines like turbines and pumps are more often operated under non-conventional operating conditions and are submitted to frequent starts and stops. This type of operating conditions has important consequences on the life cycle of the machines. It is thus of paramount importance that transient flows at off-design conditions are properly taken into account in the design phase and numerical simulation is an appropriate way to do so. The present study aims at developing a flexible coupling method of the meshbased Finite Volume Method (FVM) and the meshless Smoothed Particle Hydrodynamics - Arbitrary Lagrange Euler (SPH-ALE) method, which can be used as a tool for the investigation of transient phenomena in hydraulic machines. SPH-ALE is very well adapted for the simulation of highly dynamic flows with moving geometries but has difficulties to correctly represent rapidly changing gradients of the field variables. Particle refinement is difficult to implement, especially if particles are refined in an anisotropic way. FV methods are well established in CFD because of their accuracy and stability. However, they can be tedious for simulations with moving geometries and often necessitate an interface between moving and static parts of the mesh which introduces additional errors. To overcome the shortcomings of both methods, a coupling method is developed that uses a decomposition of the computational domain into regions where the physical field variables are computed by the FV method, regions where they are computed by SPH-ALE and overlapping regions where the information is transferred from the FV domain to the SPH domain and vice versa. In the overlapping regions FV calculation points are used as neighbors for the SPH integration in space. At the boundaries of the FV mesh, velocity and pressure are interpolated from the SPH particles by means of scattered data interpolation techniques, similarly to Chimera methods for overlapping grids. For this study, an existing SPH-ALE software of the ANDRITZ Group is used. A weakly compressible FV solver is implemented into this software that discretizes the same form of the Navier-Stokes equations than the SPH-ALE solver. Similar to the present SPH-ALE method, Riemann solvers with reconstructed states, obtained by a MUSCL scheme, are employed. Moreover, adaptations and improvements of the SPH-ALE solver itself are made, which are important for the coupling and for the simulation of internal flows in general. Thus, subsonic inlet and outlet conditions are implemented. Furthermore, a correction method of the kernel gradient is presented that ensures zeroth order consistency of the SPH-ALE approximation of the divergence of the convective fluxes. The correction improves greatly the SPH pressure field on non-uniform particle distributions. The implemented coupled method is successfully validated by means of inviscid academic one-dimensional and two-dimensional testcases like a shock tube case, Taylor-Green vortices and the flow around a symmetric NACA airfoil with particles in Eulerian description. Furthermore, the coupling provides a possibility to implement outlet boundary conditions to Lagrangian moving SPH particles. It is then applied to the simulation of transient flows in rotor stator systems in 2D with moving particles
Al, Mikdad Ouacim. « Modélisation des écoulements à surface libre en réseaux maillés et ramifiés ». Compiègne, 2000. http://www.theses.fr/2000COMP1322.
Texte intégralXia, Zhenyu. « Étude phénoménologique pour des méthodes de dimensionnement d'ouvrages d'assainissement en fonction du risque de dysfonctionnement hydraulique ». Lille 1, 2006. https://pepite-depot.univ-lille.fr/RESTREINT/Th_Num/2006/50376_2006_15.pdf.
Texte intégralDakhlaoui, Mohamed. « Fonctionnement hydraulique des structures réservoirs pour l'assainissement pluvial : étude des dispositifs de diffusion d'eau et modélisation du couple drain-milieu poreux ». Phd thesis, Ecole Nationale des Ponts et Chaussées, 1996. http://tel.archives-ouvertes.fr/tel-00523271.
Texte intégralPeretti-Pezzi, Guilherme. « Simulations hydrauliques d'haute performance dans la Grille avec Java et ProActive ». Phd thesis, Université Nice Sophia Antipolis, 2011. http://tel.archives-ouvertes.fr/tel-00977574.
Texte intégralDellinger, Guilhem. « Etude expérimentale et optimisation des performances hydrauliques des vis d'Archimède utilisées dans les micro centrales hydroélectriques ». Thesis, Strasbourg, 2015. http://www.theses.fr/2015STRAD046/document.
Texte intégralThe potential for hydropower generation using micro-hydro plants is still under exploited in Europe. The Archimede Screw Generators are a growing technology convenient for low-head hydraulic sites. This thesis studies the hydraulic performance of this turbine. The first part of thiswork presents an experimental device using a laboratory screw scale. This device allows to test screw performance for various hydraulic conditions and geometrical parameters. A theoretical model predicting the screw performance has then been developed and validated with experimental results.The complex flows occurring within the screw are studied thanks to 3D and unsteady numerical simulations. The numerical results are validated experimentally. The insights provided on the flow structure permit to develop a new leakage model. These leakages are a major source of efficiency loss. Eventually, all these results will allow the implementation of an industrial dimensioning model
Ghostine, Rabih. « Contribution à la résolution numérique des équations de Barré de Saint Venant bidimensionnelles par une méthode de type éléments finis discontinus : application à la simulation des écoulements au sein des carrefours de la ville ». Strasbourg, 2009. https://publication-theses.unistra.fr/public/theses_doctorat/2009/GHOSTINE_Rabih_2009.pdf.
Texte intégralThe scientific objective of this work of thesis is the hydraulic management of the flood in the city. The control of volumes and water depths generated by the rainy events passes by a fine knowledge of the crossroads. In fact, the flows will be distributed within the city through these nodes. The work concerns particularly the study of the numerical resolution of the two-dimensional equations of hydraulics at open channel (Saint Venant equations). The tool privileged to answer to the requests of the engineering departments of the agglomerations is the numerical simulation, only tool making it possible to make forecasts for exceptional events. The objective is thus to develop a tool for simulation robust making it possible to make choices according to objectives. The considered numerical scheme is based on the discontinuous Galerkin finite elements method associated with a slope limitation. The work will aim particularly to implements this type of scheme and to study the robustness and the stability of this new scheme of discretization in particular during the use of unstructured mesh of the crossroads of the city starting from triangular element. In the first time, the numerical scheme is favourably compared to a finite volume scheme implemented with the same properties on various hydraulic problems transient and steady. Numerical results of several flow problems show the interest of the developed method. In the second time, the numerical scheme is compared to the one-dimensional approach for the prediction of the subcritical, supercritical and transcritical flows through the junctions. We finish this memory by checking the capacities of the numerical scheme to simulate the flows which develop within the crossroads of the city, under the experimental conditions studied by Mignot et al. (2008b). Thus, the results predicted by the numerical scheme are then compared with the corresponding characteristics of the flows measured in experiments as well as with the results predicted by a 2D finite volume method and a software based
Daou, Mehdi Pierre. « Développement d’une méthodologie de couplage multimodèle avec changements de dimension : validation sur un cas-test réaliste ». Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAM061/document.
Texte intégralProgress has been performed for decades, in terms of physical knowledge, numerical techniques and computer power, that allows to address more and more complex simulations. Modelling of river and marine flows is no exception to this rule. For many applications, engineers have now to implement complex "modelling systems", coupling several models and software, representing various parts of the physical system. Such modelling systems allow addressing numerous studies, like quantifying the impacts of industrial constructions or highway structures, or evaluating the consequences of an extreme event.In the framwork of the present thesis, we address model coupling techniques using Schwarz's methodology, which is based on domain decomposition methods. The basic principle is to reduce the resolution of a complex problem into several simpler sub-problems, thanks to an iterative algorithm. These methods are particularly well suited for industrial codes, since they are very few intrusive.This thesis was realized within the framework of a CIFRE contract and thanks to the funding of the European CRISMA project and was thus greatly influenced by this industrial context. It was performed within the Artelia company, in collaboration with the AIRSEA team of the Jean Kuntzmann Laboratory, with the main objective of transferring to Artelia some knowledge and expertise regarding coupling methodologies.In this thesis, we develop a methodology for multi-model coupling with heterogeneous dimensions, based on Schwarz's methods, in order to allow modelling of complex problems in operational cases. From the industrial viewpoint, the developed coupled models must use software meeting Artelia's needs (Telemac-3D, Mascaret, InterFOAM, Open-PALM).We firstly study a testcase coupling 1-D and 3-D free surface flows, using the same software system Telemac-Mascaret. The advantage of such coupling is a reduction of the computation cost, thanks to the use of a 1-D model. However the change in the model dimension makes it difficult to define properly the notion of coupling, leading to a coupled solution which is not defined in a unique way but depends on the choice of the interface operators.Then we study a coupling case between a monophasic model and a diphasic model (1-D/3-D and 3-D/3-D), using Telemac-Mascaret and InterFOAM software systems. Once again, the main difficulty lies in the definition of interfaces operators, due to the change in the physics (monophasic / diphasic). Such a coupling makes it possible to solve complex flows that the Telemac-Mascaret system alone cannot address (breaking waves, water blade, closed-conduit flow, etc.), by locally using InterFOAM where necessary (InterFOAM is very expensive in terms of computations). Finally, we implement such a monophasic/diphasic coupling on an operational engineering study.In addition, we also present the work done during the CRISMA project. The overall objective of the CRISMA project was to develop a simulation-based decision support system for the operational crisis management in different domains of natural or industrial risks (floods, forest fires, accidental pollution, etc.). In this context, Artelia coordinated the development of an application allowing to simulate various aspects of crisis linked to flood risks in Charente-Maritime
Beauquis, Yann. « Modélisation et simulation d'un processus métallurgique de mise en forme en vue de sa commande ». Grenoble INPG, 1993. http://www.theses.fr/1993INPG0188.
Texte intégralHsu, Hao-Ming. « Gestion du risque d'inondation dans les zones urbaines : valeur ajoutée des automates cellulaires et de la modélisation à base d'agents ». Electronic Thesis or Diss., Université Côte d'Azur, 2024. http://www.theses.fr/2024COAZ5012.
Texte intégralFloods are the most common natural disasters worldwide, which can cause serious damage to property and fatality, especially in urban areas. Hence, flood risk management is essential to avoid new flood risk, to prevent and to reduce existing impact of floods and to manage residual flood risk.This study first brief reviewed several historical flood events worldwide, and especially the applications of flood risk treatment of the study areas in France and in Taiwan. The effectiveness and problems of the applications were also analysed and summarised.Then, since Agent-Based Models (ABMs) are ideal tools for simulating the actions, reactions and interactions of autonomous individuals and the environment in a complex system, in order to evaluate the effectiveness and outcomes of flood risk reduction strategies, this study employed an ABM, Netlogo, to analyse the possible interactions of human behaviour and the environment with different strategies. A coupled ABM was developed, combining (i) an evacuation model, for the agent simulations to investigate possible evacuation process during flood, and (ii) a cellular automata (CA) 2D overland flow model, for inundation simulations. Several case studies and benchmark tests were selected for verifying the models and evaluating the model performances. The evacuation model could generate plausible outcomes of the evacuation process, and the results showed the importance of the risk/flood maps and the warning alarm timing. The CA 2D overland flow model could produce promising model outputs, and the results showed great agreement between model predictions and observations in terms of inundation extent, water levels, and flow velocities.Next, the coupled ABM was applied to analyse the community-based flood risk management of the study area. The results of the coupled ABM revealed its capability of conducting inundation simulation and the potential for generating plausible outcomes of the interaction between flood water, response strategies and human behaviour during a flood event.Finally, the study proposed possible applications of the coupled ABM and feasibility of integration of the coupled ABM and a Decision Support System (DSS). Despite the possible advantages in various fields, there were still many gaps inside the structure to be filled. The most important issue about the operation of the DSS was the way of format standardisation, communication and interoperability between the various existing components.The study aims to investigate and to improve existing flood risk management, to raise public crisis awareness and to enhance community-based flood risk management
Pieritz, Romeu André. « Modélisation et simulation de milieux poreux par réseaux topologiques ». Université Joseph Fourier (Grenoble), 1998. http://www.theses.fr/1998GRE10271.
Texte intégralKovacs, Yves. « Modèles de simulation d'écoulement transitoire en réseau d'assainissement ». Phd thesis, Ecole Nationale des Ponts et Chaussées, 1988. http://tel.archives-ouvertes.fr/tel-00520785.
Texte intégralGraff, Kevin. « Contribution à la cartographie multirisques de territoires côtiers : approche quantitative des conséquences potentielles et des concomitances hydrologiques (Normandie, France) Analysis and quantification of potential consequences in multirisk coastal context at different spatial scales (Normandy, France) Characterization of elements at risk in the multirisk coastal context and at different spatial scales : Multi-database integration (normandy, France) ». Thesis, Normandie, 2020. http://www.theses.fr/2020NORMC001.
Texte intégralThe coastal environment in Normandy is conducive to a convergence of multiple hazards (erosion, marine submersion, flooding by overflowing streams or upwelling of a water table, turbid flooding by runoff, coastal or continental slope movement). Because of their interface positions, important regressive dynamics go between the marine and continental processes. This interaction will occur within the slopes and valleys where coastal populations and their activities have tended to become more densified since the 19th century. In this context, it is necessary to adopt a multi-hazard and multi-risk approach considering the spatial or temporal confluence of several hazards and their possible cascading effects and to assess the multi-sector impacts generated. by these vagaries.As part of this thesis, as well as in the ANR RICOCHET program, three study sites were selected at the outlet of the coastal rivers: from Auberville to Pennedepie, from Quiberville to Dieppe and from Criel-sur-Mer to Ault due to significant issues and strong interactions between hydrological and gravitational phenomena. Two main objectives have been carried out: (1) an methodological development on analyses of potential consequences by considering all the elements at risk within a study territory through a multiscaling approach; (2) an analysis of hydrological concomitances through a both statistical and spatial approach
Larocque, Marie. « Intégration d'approches quantitatives de caractérisation et de simulation des aquifères calcaires fissurés - application à l'aquifère karstique de la Rochefoucauld (Charentes, France) ». Poitiers, 1997. http://www.theses.fr/1997POIT2349.
Texte intégralMahdade, Mounir. « Vers une représentation parcimonieuse de la variabilité morphologique des rivières non-jaugées adaptée au problème inverse hauteur-débit ». Electronic Thesis or Diss., Sorbonne université, 2022. http://www.theses.fr/2022SORUS168.
Texte intégralThe lack of in situ measurements in ungauged rivers prevents the construction of rating curves, useful for several hydrological and hydraulic applications. In recent decades, the idea of estimating discharges by remote sensing methods has emerged, based on the principle of constructing a link between water elevation and discharge. However, this change is accompanied by a change in the scale of the elevation measurement, which is no longer attached to a cross-section but to the reach, leading to the notion of a reach-average rating curve under the same assumptions as a cross-section rating curve. This thesis treats the construction of such a curve. Since the parameters of friction, bathymetry and discharge are unknown, and to reduce the dimensionality of the problem, a hydromorphological study shows that the geometrical variability of rivers can be represented in 2D periodic model whose planform is based on a Kinoshita curve. In order to test and validate this model, a 2D reference simulation is produced on a 40km reach of the Garonne River with a continuous high-resolution topography. The simulated free surface can be considered as a set of "pseudo-observations" like those that will be produced by the SWOT mission. The 2D direct hydraulic model is based on a non-uniform geometric simplification (periodic model) and a solver of the Saint-Venant equations (Basilisk). A stochastic inversion by genetic algorithm allows to estimate the reach-averaged rating curve in a stationary regime by testing the geometrical and friction parameters that best reconstitute the observed signatures
Paquier, André. « Modélisation et simulation de la propagation de l'onde de rupture de barrage ». Saint-Etienne, 1995. http://www.theses.fr/1995STET4010.
Texte intégralHernette, Vincent. « Apport de la modélisation bond graph à la conception d'une suspension active ». Ecully, Ecole centrale de Lyon, 1995. http://www.theses.fr/1995ECDL0009.
Texte intégralThis work deals with a design procedure allowing the development of active automobile suspensions. Bond graph modeling technics are used to carry out simulations in both the frequency and time domains. The approach presents two different aspect : on the one hand the suspension in broken down into its hierarchical components (quater car diagram, bicycle suspension. . . ) and the chapters are arranged according to this breakdown. On the other hand systematic study of the models is carried outgoing through, first of all, exploratory linear studies followed by more in-depth non-linear studies. The first chapter deals with the specificities of the basic hydraulic suspension. The second chapter is dedicated to the quater car model. Within the framework of a precise activation strategy, control laws are tested through application to increasingly realistic automobile models. The third chapter treats modeling of hydraulic control devices. The flow spool, the valve which supplies liquid to the suspension jack, is first covered. Secondly design of an accelerometer sensor according to the principals of a pressure spool is investigated. The fourth chapter deals with a transversal bicycle suspension model aimed at allowing better control of roll motion (roll-damping). The final section, concerning the results and conclusions, highlights the validity of the design procedure which resulted in the development of several prototypes