Academic literature on the topic 'Approche statistique de la mécanique des fluides'
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Journal articles on the topic "Approche statistique de la mécanique des fluides":
Plutniak, Sébastien, and Dimitri Aguéra. "Reliquats en devenir : une approche dynamique de l’écologie documentaire d’un laboratoire de mécanique des fluides." Sciences de la société, no. 89 (October 1, 2013): 54–73. http://dx.doi.org/10.4000/sds.241.
Quantin, M., C. Morio, G. Guibu Pereira, J. Vazquez, J. Wertel, S. Isel, S. Galuola, and J. Buche. "Calibration numérique 3D de vannes basculantes pour la mesure du débit déversé." Techniques Sciences Méthodes, no. 5 (May 2019): 89–100. http://dx.doi.org/10.1051/tsm/201905089.
Techniques de l’Ingénieur, Éditions. "Conception des réseaux et des installations en eau - Approche par la mécanique des fluides." Techniques du bâtiment : le second oeuvre et les lots techniques, September 2016. http://dx.doi.org/10.51257/a-v2-tba2515.
Dissertations / Theses on the topic "Approche statistique de la mécanique des fluides":
Venaille, Antoine. "Mélange et circulation océanique : une approche par la physique statistique." Phd thesis, Grenoble 1, 2008. http://www.theses.fr/2008GRE10310.
Understanding how the small scales affect the large scales in oceans is an important issue for the description of surface currents and of the vertical structure of the oceans. The huge number of degrees of freedom involved in those problems makes any deterministic approach illusory. By contrast, the traditional tools of statistical mechanics allow to reduce those problems to the study of only a few parameters. In the first part, the equilibrium statistical mechanics of two-dimensional flows is applied to the study of simple ocean models. The second part is a phenomenological approach to turbulent mixing in stratified flows; the aim is to describe the temporal evolution of the probability to measure a certain value of the fluid density at a given depth
Venaille, Antoine. "Mélange et circulation océanique : une approche par la physique statistique." Phd thesis, Université Joseph Fourier (Grenoble), 2008. http://tel.archives-ouvertes.fr/tel-00347063.
Ottonelli, Claudio. "Apprentissage statistique de modèles réduits non-linéaires par approche expérimentale et design de contrôleurs robustes: le cas de la cavité ouverte." Phd thesis, Ecole Polytechnique X, 2014. http://pastel.archives-ouvertes.fr/pastel-01065782.
Fontaine, Côme. "Etude de deux modèles simplifiés de turbulence à l'aide du groupe de renormalisation fonctionnel : l'équation de Burgers et le modèle de Sabra." Electronic Thesis or Diss., Université Grenoble Alpes, 2023. http://www.theses.fr/2023GRALY083.
In this thesis, we focus on two simplified models describing turbulent flows. In these two models, the turbulent state exhibits scale-invariance and universal statistical properties resembling those of true hydrodynamical turbulence. This type of behaviour is very familiar in physics: it corresponds to a critical system. In this work, we use a widely used tool in the study of criticality: the functional renormalisation group (FRG). The first model, named the Sabra shell model, describes effective interactions among a discrete number of velocity modes of a turbulent fluid. This schematic description captures many essential properties of turbulent flows. In particular, the velocity field is multifractal. The way in which the dynamics generates this multifractality is still poorly understood from a theoretical perspective. In this thesis, we formulate a reverse renormalisation flow, meaning that we integrate out the largest scales first. Using this method, we find a fixed point of the renormalisation flow with anomalous scale invariance, relatively close to the expected value for certain observables. We show that it is clearly distinct from the fixed point obtained when all scales are forced, through a forcing with a power-law spectrum, which corresponds to the fixed point of the RG obtained in perturbation theory. The second model studied is the Burgers equation, which describes the dynamics of a fluid in the absence of pressure. We focus on the effect of a conservative noise on the velocity field. We prove the existence of a scale invariant regime with a critical dynamical exponent z=1 using an exact closure of the renormalisation flow equation. This closure relies on the existence of certain symmetries of the Burgers equation. Indications of the existence of this new scaling regime were previously found in numerical solutions of the Burgers equation. We provide in this thesis a theoretical proof of its existence and calculate the associated universal properties
Monchaux, Romain. "Approche statistique des écoulements turbulents." Paris 7, 2007. http://www.theses.fr/2007PA077206.
This work presents two studies based on the experimental von Karman flow. On the one side, we compare theoritical predictions obtained in the ideal case of a statistical mechanics derived for inviscid force-free axisymmetric flows to Stereoscopic Particule Imaging Velocimetry (SPIV) measurements. We get global relations characterizing the system's steady states and showing a tendency to velocity-vorticity alignement at high Reynolds numbers. On the other side, in the VKS collaboration, we study dynamo action in an unconstrained liquid sodium flow. This effet is an instability which is assumed to be responsible for astrophysic object's magnetic fields, the Earth's one for example. The VKS2 experiment has demonstrated for the first time a dynamo action leading to a wide variety of time-dependent dynamics: steady states, oscillations, intermittency and even randomly switching behaviours close to Earth's magnetic field are presented. We show that these different dynamics can be classified with respect to the experiment's Rossby number. We underline the links existing between hydrodynamic and magnetohydrodynamic bifurcations
Bonnifet, Valentin. "Prédiction du phénomène de tremblement sur un profil d'aile avec une approche LES de type PANS-RSM." Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS389.
This PhD was devoted to develop a Large Eddy Simulation subgrid scale model based on transport equations. The subgrid scale model is built in the same manner as second order statistical model suggested by Gerolymos-Lo-Vallet-Younis. A constant control parameter has been introduced to tune the amount of turbulent kinetic energy handled by subgrid scale model. This parameter allows a bridging from Direct Numerical Simulation to Reynolds Averaged Navier-Stokes. This approach can correctly predict turbulent flow with coarser grid and time step than canonical Large Eddy Simulation based on algebraic subgrid scale models where subgrid length scale corresponds to Taylor micro scale. Indeed, the subgrid scale model handles a large part of turbulent kinetic energy in the boundary layer.Transonic flow simulation around OAT15A airfoil is carried out using the suggested approach. On particular inflow conditions, the shock-wave shows a self-sustained motion on the airfoil upper side resulting from the shock-wave boundary layer interaction. Reynolds Averaged Navier-Stokes is not able to predict averaged field because this large unsteadiness is undeterministic and an LES approach is needed. According to the results, the suggested approach can handle shock-wave motion. Filtered flow field, turbulent correlation and control parameter impact analysis are presented. Finally, development ways are suggested in order to improve the subgrid scale model using inhomogeneous control parameter in space and/or time
Agullo, Olivier. "Dynamique des tourbillons et statistique des vortex ponctuels." Aix-Marseille 1, 1997. http://www.theses.fr/1997AIX11067.
Lafon, Philippe. "Mélange laminaire de fluides miscibles en cuve agitée : approche numérique." Toulouse, INPT, 1989. http://www.theses.fr/1989INPT021G.
Ngot, Kongolo Joseph Christian. "Stabilité des gradins des exploitations à ciel ouvert : approche statistique mécanique et probabiliste." Vandoeuvre-les-Nancy, INPL, 1990. http://www.theses.fr/1990INPL050N.
Poli, Charles. "Chaos ondulatoire en milieux ouverts : approche statistique par la théorie des matrices aléatoires non-hermitiennes." Nice, 2009. http://www.theses.fr/2009NICE4091.
In the field of Wave Chaos, statistics of ideal closed systems are nowadays well understood. However, much less is known for open systems, namely for systems those coupling to environment cannot be neglected anymore. Applying the Random Matrix Theory to the formalism of the effective Hamiltonian, spectral and spatial statistics of open chaotic systems are investigated analytically. Furthermore, theoretical predictions are checked systematically through numerical simulations of random matrices. In the spectral domain, the modifications induced by the openness on the spacings and the avoided crossings are illustrated using the resonance trapping effect. The well-known distributions of spacings and avoided crossings are generalized to open chaotic systems that allow to explain results based on microwave experiments. In the spatial domain, statistics of the non-orthogonal parameter, which measures the impact of the openness on the eigenfunctions of the effective Hamiltonian, are derived analytically and verified by numerical simulations modelling chaotic complexness parameter for a given resonance, is also obtained. This finding is confirmed through electrodynamics experiments
Books on the topic "Approche statistique de la mécanique des fluides":
Symposium on Trends in Applications of Pure Mathematics to Mechanics (6th 1985 Bad Honnef, Germany). Trends in applications of pure mathematics to mechanics: Proceedings of the Sixth Symposium on Trends in Applications of Pure Mathematics to Mechanics, held at the Physikzentrum of the German Physical Society, Bad Honnef, October 21-25, 1985. Berlin: Springer-Verlag, 1986.
Kalikmanov, V. I. Statistical Physics of Fluids: Basic Concepts and Applications (Theoretical and Mathematical Physics). Springer, 2001.
Book chapters on the topic "Approche statistique de la mécanique des fluides":
"2.10 - Approche de la supraconductivité par la mécanique des fluides." In Supraconductivité, 41–42. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-0858-8-022.
"2.10 - Approche de la supraconductivité par la mécanique des fluides." In Supraconductivité, 41–42. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-0858-8.c022.