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Добірка наукової літератури з теми "Navier Stoke"

Автор: Grafiati

Опубліковано: 11 березня 2023

Оновлено: 1 квітня 2023

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Статті в журналах з теми "Navier Stoke"

Cai, Jiaxi, Yihan Wang, and Shuonan Yu. "The Recent Progress and the State-of-art Applications of Navier Stokes Equation." Highlights in Science, Engineering and Technology 12 (August 26, 2022): 114–20. http://dx.doi.org/10.54097/hset.v12i.1413.

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Navier Stoke equation plays an important role in physics field to describe the movement of fluid. In description of movement of fluid, turbulent flow is difficult to describe because it cannot be predicted precisely for movement of every particle. In this paper, we present the basic information of Navier Stoke equation, history of developing Navier Stoke equation as well as solving method. In addition, the state-of-art applications in fluid mechanics are also demonstrated. Moreover, the limitation of Navier Stoke equation and its future prospect are proposed accordingly. These results shed light on guiding further exploration focusing on the fluid mechanics.

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Huan, Diem Dang. "Stability of stochastic 2D Navier-Stokes equations with memory and Poisson jumps." Open Journal of Mathematical Sciences 4, no. 1 (November 30, 2020): 417–29. http://dx.doi.org/10.30538/oms2020.0131.

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The objective of this paper is to study the stability of the weak solutions of stochastic 2D Navier-Stokes equations with memory and Poisson jumps. The asymptotic stability of the stochastic Navier-Stoke equation as a semilinear stochastic evolution equation in Hilbert spaces is obtained in both mean square and almost sure senses. Our results can extend and improve some existing ones.

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Yanti, Rahma. "Pengaruh Posisi Bukaan terhadap Penghawaan Alami pada Rumah Balai Padang." Gorontalo Journal of Infrastructure and Science Engineering 2, no. 1 (April 1, 2019): 10. http://dx.doi.org/10.32662/gojise.v2i1.525.

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Penelitian ini bertujuan untuk mengetahui efek dari posisi dari bukaan yang ada di rumah Balai Padang. Metode yang digunakan adalah eksperimental dengan menggunakan bantuan software CFD (computational Fluid Dimension) berdasarkan persamaan Navier-Stoke, menggunakan K-Epsilon RNG. Eksperimen dilakukan dengan validasi hasil pengukuran lapangan This study aims to investigate the effect of position openings in Balai Padang house. The numerical methodology is based on solution of the Navier-Stokes equations, using K-epsilon RNG. Numerical results are validated with available field measurement data.

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Almady, Wasif. "Analytical Solution for Boltzmann Collision Operator for the1-D Diffusion equation." International Journal for Research in Applied Science and Engineering Technology 9, no. 9 (September 30, 2021): 1514–17. http://dx.doi.org/10.22214/ijraset.2021.38189.

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Abstract: In this paper, we have presented the analytical solution of the collision operator for the Boltzmann equation of onedimensional diffusion equation using the analytical solution of the one-dimensional Navier Stoke diffusion equation. Keywords: Boltzmann equation; analytical collision operator; one-dimensional diffusion equation.

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Lévy, T., and E. Sanchez-Palencia. "Einstein-like approximation for homogenization with small concentration. II—Navier-Stoke equation." Nonlinear Analysis: Theory, Methods & Applications 9, no. 11 (November 1985): 1255–68. http://dx.doi.org/10.1016/0362-546x(85)90034-3.

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Zhu, Bao Li, Hui Pen Wu, and Tian Hang Xiao. "Study of Aerodynamic Interactions of Dual Flapping Airfoils in Tandem Configurations." Applied Mechanics and Materials 160 (March 2012): 301–6. http://dx.doi.org/10.4028/www.scientific.net/amm.160.301.

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The unsteady viscous flow fields of dual flapping airfoils in tandem configurations are simulated by a Navier-Stokes Solver based on dynamic deformable hybrid meshes. Aerodynamic interactions of three motion models are studied including flapping fore airfoil with fixed aft airfoil, two airfoils flapping in phase and out-of-phase. The results indicate that the aft airfoil in the wake of the flapping fore airfoil has great influence on the aerodynamic performance. When the fore airfoil flaps with a fixed aft airfoil, the thrust generation and thrust propulsive efficiency were enhanced by 65% and 44% respectively, compared to that of single flapping airfoil. When the two airfoils stoke in phase, the thrust generation is twice over that of single flapping airfoil. However the out-of-phase stroking has relatively much lower thrust.

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Basuki, Imam, and Fredy Susanto. "Aliran Fluida Laminer Pada Pipa Non Horizontal." JEECAE (Journal of Electrical, Electronics, Control, and Automotive Engineering) 4, no. 2 (December 3, 2019): 301–5. http://dx.doi.org/10.32486/jeecae.v4i2.435.

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aliran fluida dalam pipa nonhorizontal merupakan aliran dalam koordinat silindrikal merupakan aliran yang berkembang secara penuh dalam arah subu z. dengan menerapkan prinsip-prinsip hokum kekekalan masa dan momentum, serta berpendekatan pada teorema gauss serta menentukan kondisi batas teoritisnya, maka aplikasi persamaan navier stoke menghasilkan gambaran nilai laju arah aliran fluida berkembang penuh dalam pipa, profile aliran berupa profil aliran hiperbolik dalam pipa alir, dan laju rata-rata volume fluida yang memiliki kekuatan laju dalam nilai kuadrat 4 nilai jari-jari pipa alirnya (a^4 ).

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Ibthisham, A. Mohd, Srithar Rajoo, Amer Nordin Darus, Mazlan Abdul Wahid, Mohsin Mohd Sies, and Aminuddin Saat. "Simulation of Corrected Mass Flow and Non-Adiabatic Efficiency on a Turbocharger." Applied Mechanics and Materials 388 (August 2013): 23–28. http://dx.doi.org/10.4028/www.scientific.net/amm.388.23.

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The aim of this project is to evaluate turbine’s performance based on its actual condition. Holset H3B nozzles turbine geometry was used as simulation model. Turbine’s actual working condition was simulated using finite volume method (FVM). Three-dimensional Navier Stoke equations with heat convection loss via turbine volute are solved. The parameters studied are corrected mass flow and turbine’s efficiency at different heat transfer coefficients. Temperature difference within turbine’s volute is the major factor that deteriorates turbine’s efficiency. It is found that the higher the heat transfer coefficient, the lower turbine’s efficiency will be.

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Tasri. "Simple Improvement of Momentum Interpolation Equation for Navier-Stoke Equation Solver on Unstructured Grid." Journal of Mathematics and Statistics 6, no. 3 (August 1, 2010): 265–70. http://dx.doi.org/10.3844/jmssp.2010.265.270.

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MORINISHI, Koji. "A Preliminary Study of the Boltzmann/Navier-Stoke Hybrid Method for Micro Flow Simulation." Proceedings of The Computational Mechanics Conference 2004.17 (2004): 81–82. http://dx.doi.org/10.1299/jsmecmd.2004.17.81.

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Більше джерел

Дисертації з теми "Navier Stoke"

Maidana, Manuel Augusto. "Desarrollo de un modelo numérico 3D en elementos finitos para las ecuaciones de Navier-Stokes : aplicaciones oceanográficas." Doctoral thesis, Universitat Politècnica de Catalunya, 2007. http://hdl.handle.net/10803/457520.

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En esta tesis se ha desarrollado y validado un modelo tridimensional de circulación costera en elementos finitos capaz de simular una región limitada del océano. La escala de longitud de las aplicaciones pueden ser del orden del ancho de la plataforma continental o menores y la escala de tiempo entre el período de las ondas de las mareas y de las ondas debidas al viento. La formulación del modelo, denominado HELIKE, está basada en las tres componentes de la ecuación de Navier-Stokes (no-hidrostáticas) y tiene en cuenta las dos componentes de la aceleración de Coriolis, (componentes normal y tangencial a la superficie terrestre), gradientes de densidad, turbulencia (valores constantes o modelos de turbulencia como Smagorinsky, Munk-Anderson o Pacanowski-Philander), fricción con fondo, tensión de viento y superficie libre. Pudiéndose también utilizar el modelo en fondos con batimetrías irregulares (fondo no-horizontal). Los modelos tridimensionales no-hidrostáticos como el desarrollado en esta tesis están bien planteados para dominios con contorno abierto. Esto es muy importante en el modelado de mesoescala donde el modelado de la pequeña, pero relevante, velocidad vertical es importante y los contornos abiertos son inevitables. La formulación no-hidrostática tiene fundamentalmente importancia cuando la escala horizontal del movimiento se hace comparable con su escala vertical y no se pueda despreciar la velocidad vertical como por ejemplo, se da el caso en la circulación sobre fondos abruptos, convección en el océano abierto, etc. El uso combinado de una discretización espacial por el método de los elementos finitos y el uso de mallas no-estructuradas proveen al modelo una gran flexibilidad para adaptarse a la complicada geometría de la línea de costa y del fondo marino. Además de la posibilidad de realizar refinamientos de la malla sobre áreas de mayor interés y aplicar las condiciones de contorno apropiadas para cada caso.
In this thesis finite element model was developed, named HELIKE, for the numerical simulation of the three-dimensional, turbulent, non-hydrostatic, free-surface flows like those arising in the study of the motion of water in coastal regions. The kinematic free-surface equation is used to compute the surface elevation, without resorting to vertical averages. The model developed here incorporates surface wind stress, bottom friction, Coriolis acceleration, the baroclinic term to take account the density gradients, and it is applicable to irregular bottom topographies. A pressure stabilization technique is employed to stabilize the finite element solution. Numerical results confirm the accuracy, robustness and applicability of the proposed method.

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Ghosh, Amrita. "Naviers-Stokes equations with Navier boundary condition." Thesis, Pau, 2018. http://www.theses.fr/2018PAUU3021/document.

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Le titre de ma thèse de doctorat est "Equations de Stokes et de Navier-Stokes avec la con- dition de Navier", où j’ai considéré l’écoulement d’un fluide newtonien visqueux, incompressible dans un domaine borné de R3. L’écoulement du fluide est décrit par les équations bien connues de Navier-Stokes, données par le système suivant ∂t − ∆u + (u • ∇)u + ∇π = 0, div u = 0 dans Ω × (0, T )u • n = 0, 2[(Du)n]τ + αuτ = 0 sur Γ × (0, T )u(0) = u0 dans Ω (0.1) dans un domaine borné Ω ⊂ R3 de frontière Γ, éventuellement non simplement connexe, de classe C1,1. La vitesse initiale u0 et le coefficient de friction α, scalaire, sont des fonctions don- nées. Les vecteurs unitaires normal extérieur et tangents à Γ sont notés n et τ respectivement et Du = 1 (∇u + ∇uT ) est le tenseur des déformations. Les fonctions u et π décrivent respective- ment les champs de vitesses et de pression du fluide dans Ω satisfaisant la condition aux limites (0.1.2).Cette condition aux limites, proposée par H. Navier en 1823, a été abondamment étudiée ces dernières années, qui pour de nombreuses raisons convient parfois mieux que la condition aux limites de Dirichlet sans glissement : elle offre plus de liberté et est susceptible de fournir une solution physiquement acceptable au moins pour certains des phénomènes paradoxaux résultant de la condition de non-glissement, comme par exemple le paradoxe de D’Alembert ou le paradoxe de non-collision.Ma thèse comporte trois parties. Dans la première, je cherche à savoir si le problème (0.1) est bien posé en théorie Lp, en particulier l’existence, l’unicité de solutions faibles, fortes dans W 1,p(Ω) et W 2,p(Ω) pour tout p ∈ (1, ∞), en considérant la régularité minimale du coefficient de friction α. Ici α est une fonction, pas simplement une constante qui reflète les diverses propriétés du fluide et/ou de la frontière, ce qui nous permet d’analyser le comportement de la solution par rapport au coefficient de frottement.Utilisant le fait que les solutions sont bornées indépendamment de α, on montre que la solution des équations de Navier-Stokes avec la condition de Navier converge fortement vers une solution des équations de Navier-Stokes avec la condition de Dirichlet, correspondant à la même donnée initiale dans l’espace d’énergie lorsque α → ∞. Des résultats similaires ont été obtenus pour le cas stationnaire.Le dernier chapitre concerne les estimations pour le problème de Robin pour le laplacien : l’opérateur elliptique de second ordre suivant, sous forme divergentielle dans un domaine bornéΩ ⊂ Rn de classe C1, avec la condition aux limites de Robin a été considéré div(A∇)u = divf + F dans Ω, ∂u+ αu = f n + g sur Γ.∂n (0.2) Les coefficients de la matrice symétrique A sont supposés appartenir à l’espace V MO(R3). Aussi α est une fonction appartenant à un certain espace Lq . En plus de prouver l’existence, l’unicité de solutions faibles et fortes, nous obtenons une borne sur u, uniforme par rapport à α pour α suffisamment large, en norme Lp. Pour plus de clarté, nous avons étudié séparément les deux cas: l’estimation intérieure et l’estimation au bord
My PhD thesis title is "Navier-Stokes equations with Navier boundary condition" where I have considered the motion of an incompressible, viscous, Newtonian fluid in a bounded do- main in R3. The fluid flow is described by the well-known Navier-Stokes equations, given by thefollowing system 1 )t − L1u + (u ⋅ ∇)u + ∇n = 0, div u = 01u ⋅ n = 0, 2[(IDu)n]r + aur = 0 in Q × (0, T )on Γ × (0, T ) (0.1) 11lu(0) = u0 in Qin a bounded domain Q ⊂ R3 with boundary Γ, possibly not connected, of class C1,1. The initialvelocity u0 and the (scalar) friction coefficient a are given functions. The unit outward normal and tangent vectors on Γ are denoted by n and r respectively and IDu = 1 (∇u + ∇uT ) is the rate of strain tensor. The functions u and n describe respectively the velocity2 and the pressure of a fluid in Q satisfying the boundary condition (0.1.2).This boundary condition, first proposed by H. Navier in 1823, has been studied extensively in recent years, among many reasons due to its contrast with the no-slip Dirichlet boundary condition: it offers more freedom and are likely to provide a physically acceptable solution at least to some of the paradoxical phenomenons, resulting from the no-slip condition, for example, D’Alembert’s paradox or no-collision paradox.My PhD work consists of three parts. primarily I have discussed the Lp -theory of well-posedness of the problem (0.1), in particular existence, uniqueness of weak and strong solutions in W 1,p (Q) and W 2,p (Q) for all p ∈ (1, ∞) considering minimal regularity on the friction coefficienta. Here a is a function, not merely a constant which reflects various properties of the fluid and/or of the boundary. Moreover, I have deduced estimates showing explicitly the dependence of u on a which enables us to analyze the behavior of the solution with respect to the friction coefficient.Using this fact that the solutions are bounded with respect to a, we have shown the solution of the Navier-Stokes equations with Navier boundary condition converges strongly to a solution of the Navier-Stokes equations with Dirichlet boundary condition corresponding to the sameinitial data in the energy space as a → ∞. The similar results have also been deduced for thestationary case.The last chapter is concerned with estimates for a Laplace-Robin problem: the following second order elliptic operator in divergence form in a bounded domain Q ⊂ Rn of class C1, withthe Robin boundary condition has been considered1div(A∇)u = divf + F in Q, 11 )u + u = f ⋅ n + g on Γ. (0.2) 2The coefficient matrix A is symmetric and belongs to V MO(R3). Also a is a function belonging to some Lq -space. Apart from proving existence, uniqueness of weak and strong solutions, we obtain the bound on u, uniform in a for a sufficiently large, in the Lp -norm. We have separately studied the two cases: the interior estimate and the boundary estimate to make the main idea clear in the simple set up

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GALLANA, LUCA. "Statistical analysis of inhomogeneous fluctuation fields. Scalar transport in shearless turbulent mixing, effects of stratification, solar wind and solar wind-interstellar medium interaction." Doctoral thesis, Politecnico di Torino, 2016. http://hdl.handle.net/11583/2653026.

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Turbulence is a condition that can occur in a broad range of fluids, which may belong to very different physical environments, each with their own unique characteristics. Mathematical and analytical studies are generally limited by the high degree of complexity of the system, therefore, numerical/laboratory experiments and in-situ measurements play a fundamental role in the study of these phenomena. An analysis on two different anisotropic fluctuating fluid fields has been performed: both flows, while belonging to different physical contexts, are characterized by the presence of multiscale inhomogeneous fluctuations, to which is associated a strong anisotropy, and by the presence of effects related to stratification / mixing. The first is one of the most simple anisotropic turbulent flow, namely the shearless turbulent mixing, and it has been studied by means of direct numerical simulation of Navier-Stokes equations, with the aim of characterize the passive scalar transport and the effects related to the presence of a thermal stratification. The second is a more complex fluid field, that is the solar wind, which belong to magnetohydrodynamic flows; the analysis on solar wind have been performed taking advantage of in-situ measurement of the Voyager 2 spacecraft, trying to provide a statistical and spectral characterization despite the presence of gaps in the recorded time-series.

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Cai, Zhemin. "A High-order Discontinuous Galerkin Method for Simulating Incompressible Fluid-Thermal-Structural Problems." Thesis, The University of Sydney, 2018. http://hdl.handle.net/2123/20961.

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The use of discontinuous Galerkin (DG) methods to solve fluid thermal structure interaction problems in numerical modelling is known to offer several advantages. In particular, DG methods provide the flexibility of using different approximations in different elements, which makes the methods ideal for hp-adaptivity. The first objective of this thesis is to present a framework for the computation of fluid thermal structure interaction problems within both the single and multi-solid domain using DG methods on unstructured grids. The full solver consists of four main components: the incompressible fluid solver, the conjugate heat transfer solver, the linear elastic solver and the fluid to structure interaction solver. Based on an earlier developed DG solver for the incompressible Navier-Stokes equation, the fluid advection-diffusion equation, the Boussinesq term, the solid heat equation and the linear elastic equation are introduced using an explicit DG formulation. A Dirichlet-Neumann partitioning strategy has been implemented to achieve the data exchange process via the numerical flux of interface quadrature points in the fluid-solid interface. Formal h and p convergence studies employing the method of manufactured solutions demonstrate that the expected order of accuracy is achieved. Computational effort is documented in detail demonstrating precisely that for all cases the highest order accurate algorithm has several magnitudes lower error than lower-order schemes for a given computational effort. Secondly, this thesis has proposed a detailed compact thermoelectric cooler (TEC) modelling method based on an existing black box like compact TEC model. Close comparisons validate that both the detailed and the black box like compact model are accurate enough to simulate the conduction only case. When air convection is required to carry out a system-level thermal management optimization, the detailed compact modelling method is more reliable.

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BORDIGNON, ALEX LAIER. "NAVIER-STOKES EM GPU." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2006. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=8928@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
Nesse trabalho, mostramos como simular um fluido em duas dimensÃµes em um domÃnio com fronteiras arbitrÃ¡rias. Nosso trabalho Ã© baseado no esquema stable fluids desenvolvido por Joe Stam. A implementaÃ§Ã£o Ã© feita na GPU (Graphics Processing Unit), permitindo velocidade de interaÃ§Ã£o com o fluido. Fazemos uso da linguagem Cg (C for Graphics), desenvolvida pela companhia NVidia. Nossas principais contribuiÃ§Ãµes sÃ£o o tratamento das mÃºltiplas fronteiras, onde aplicamos interpolaÃ§Ã£o bilinear para atingir melhores resultados, armazenamento das condiÃ§Ãµes de fronteira usa apenas um canal de textura, e o uso de confinamento de vorticidade.
In this work we show how to simulate fluids in two dimensions in a domain with arbitrary bondaries. Our work is based on the stable fluid scheme developed by Jo Stam. The implementation is done in GPU (Graphics Processinfg Unit), thus allowing fluid interaction speed. We use the language Cg (C for Graphics) developed by the company Nvídia. Our main contributions are the treatment of domains with multiple boundaries, where we apply bilinear interpolation to obtain better results, the storage of the bondaty conditions in a unique texturre channel, and the use of vorticity confinement.

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Rejaiba, Ahmed. "Equations de Stokes et de Navier-Stokes avec des conditions aux limites de Navier." Thesis, Pau, 2014. http://www.theses.fr/2014PAUU3050/document.

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Résumé : Cette thèse est consacrée à l'étude des équations de Stokes et de Navier-Stokes avec des conditions aux limites de Navier dans un ouvert borné de . Le manuscrit ici est composé de trois chapitres. Dans le premier, nous considérons les équations de Stokes stationnaires avec des conditions aux limites de Navier. Nous démontrons l'existence, l'unicité et la régularité de la solution d'abord dans un cadre hilbertien puis dans le cadre de la théorie . Nous traitons aussi le cas de solutions très faibles. Dans le deuxième chapitre, nous nous intéressons aux équations de Navier-Stokes avec la condition de Navier. Sous certaines hypothèses sur les données, nous démontrons l'existence de solution faible dans , avec en utilisant un théorème du point fixe appliqué à un problème d'Oseen. Nous démontrons examinons ensuite les questions de régularité des solutions en particulier dans . Dans le dernier chapitre, nous étudions le problème d'évolution de Stokes avec la condition de Navier. La résolution de ce problème se fait au moyen de la théorie des semi-groupes analytiques qui jouent un rôle important pour établir l'existence et l'unicité de la solution dans le cas homogène. Nous traitons le cas du problème non homogène par le biais des puissances imaginaires de l'opérateur de Stokes
This thesis is devoted to the study of the Stokes equations and Navier-Stokes equations with Navier boundary conditions in a bounded domain of . The work contains three chapters: In the first chapter, we consider the stationary Stokes equations with Navier boundary condition. We show the existence, uniqueness and regularity of the solution in the Hilbert case and in the -theory. We prove also the case of very weak solutions. In the second chapter, we focus on the Navier-Stokes equations with the Navier boundary condition. We show the existence of the weak solution in , with by a fixed point theorem over the Oseen equation. We show also the existence of the strong solution in . In chapter three, we study the evolution Stokes problem with Navier boundary condition. For this, we apply the analytic semi-groups theory, which plays a crucial role in the study of existence and uniqueness of solution in the case of the homogeneous evolution problem. We treat the case of non-homogeneous problem through imaginary powers of the Stokes operator

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Cannone, Marco. "Ondelettes, paraproduits et Navier-Stokes." Paris 9, 1994. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=1994PA090016.

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Dans cette thèse nous donnons quelques théorèmes d'existence et unicité de solutions mild du problème de Cauchy associe aux équations de Navier-Stokes. Dans la première partie, inspirés par une approche en ondelettes établie par P. Federbush, nous utilisons la décomposition de Littlewood-Paley pour en déduire un théorème d'existence et unicité locale de solutions mild à valeurs dans un espace de Banach abstrait de distributions. Nombreux exemples de tels espaces seront fournis, comme ceux de Lebesgue, Sobolev, Morrey-Campanato et Besov. La deuxième partie de la thèse est consacrée aux solutions globales mild dans des espaces de Banach dont la norme est invariante par les dilatations normalisées. En particulier, nous généralisons un résultat classique du a t. Kato en faisant remarquer que le temps de vie de sa solution globale est, en effet, donne par une norme Besov plus faible que celle usuelle de Lebesgue ne le laissait prévoir. Enfin, nous montrons comment utiliser lesdits espaces de Besov pour en déduire un théorème d'existence et unicité de solutions auto-similaires pour les équations de Navier-Stokes

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Mallinger, François. "Couplage adaptatif Boltzmann Navier-Stokes." Paris 9, 1996. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=1996PA090042.

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Nous étudions les écoulements externes en régime semi raréfié à grands nombre de mach. Pour ce faire, nous proposons une stratégie de décomposition de domaine couplant les modèles Boltzmann et Navier-Stokes. Le couplage est réalisé par le biais de conditions aux limites. Les domaines de calcul Boltzmann et Navier-Stokes sont déterminés de manière automatique par un critère analysant la validité de la solution Navier-Stokes. Nous proposons donc un algorithme de couplage adaptatif qui prend en compte d'une part la détermination automatique des domaines, et d'autre part un algorithme de marche en temps pour le couplage des modèles. Le couplage adaptatif résulte d'une interprétation cinétique des équations de Navier-Stokes. Pour le généraliser, nous étudions la transition entre régimes microscopiques (Boltzmann) and macroscopiques (Navier-Stokes) pour des gaz diatomiques, en étendant la démarche initiale de grad. Enfin nous donnons une justification mathématique du couplage Boltzmann Navier-Stokes
We study external flows for semirarefied régimes at high mach number. We propose a domain décomposition strategy coupling Boltzmann and Navier-Stokes models. The coupling is done by boundary conditions. The Boltzmann and Navier-Stokes computational domains are defined automatically thanks to a critérium analysing the validity of the numerical Navier-Stokes solution. We propose therefore an adaptative coupling algorithm taking into account both the automatic définition of the computation domains and a time marching algorithm to couple the models. The whole strategy results from the transition between the microscopie model (Boltzmann) and the macroscopie model (Navier-Stokes). In order to generalize this adaptative coupling, we study this connection for diatomic gases. Finally, we justify the coupled problem from a mathematical view point

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Landmann, Björn. "A parallel discontinuous Galerkin code for the Navier-Stokes and Reynolds-averaged Navier-Stokes equations." [S.l. : s.n.], 2008. http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-35199.

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Landmann, Björn. "A parallel discontinuous Galerkin code for the Navier-Stokes and Reynolds averaged Navier-Stokes equations." München Verl. Dr. Hut, 2007. http://d-nb.info/988422433/04.

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Книги з теми "Navier Stoke"

E, Jorgenson Philip C., and United States. National Aeronautics and Space Administration., eds. A mixed volume grid approach for the Euler and Navier-Stokes equations. [Washington, DC]: National Aeronautics and Space Administration, 1996.

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Łukaszewicz, Grzegorz, and Piotr Kalita. Navier–Stokes Equations. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-27760-8.

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Kollmann, Wolfgang. Navier-Stokes Turbulence. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-31869-7.

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Constantin, P. Navier-Stokes equations. Chicago: University of Chicago Press, 1988.

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Ramm, Alexander G. The Navier-Stokes Problem. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-031-02431-3.

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Plotnikov, Pavel, and Jan Sokołowski. Compressible Navier-Stokes Equations. Basel: Springer Basel, 2012. http://dx.doi.org/10.1007/978-3-0348-0367-0.

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Sohr, Hermann. The Navier-Stokes Equations. Basel: Springer Basel, 2001. http://dx.doi.org/10.1007/978-3-0348-0551-3.

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Sohr, Hermann. The Navier-Stokes Equations. Basel: Birkhäuser Basel, 2001. http://dx.doi.org/10.1007/978-3-0348-8255-2.

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Zeytounian, Radyadour Kh. Navier-Stokes-Fourier Equations. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-20746-4.

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Частини книг з теми "Navier Stoke"

Di Pietro, Daniele Antonio, and Jérôme Droniou. "Navier–Stokes." In The Hybrid High-Order Method for Polytopal Meshes, 421–74. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-37203-3_9.

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Debussche, Arnaud, Berenger Hug, and Etienne Mémin. "Modeling Under Location Uncertainty: A Convergent Large-Scale Representation of the Navier-Stokes Equations." In Mathematics of Planet Earth, 15–26. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-18988-3_2.

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AbstractWe construct martingale solutions for the stochastic Navier-Stokes equations in the framework of the modelling under location uncertainty (LU). These solutions are pathwise and unique when the spatial dimension is 2D. We then prove that if the noise intensity goes to zero, these solutions converge, up to a subsequence in dimension 3, to a solution of the deterministic Navier-Stokes equation. This warrants that the LU Navier-Stokes equations can be interpreted as a large-scale model of the deterministic Navier-Stokes equation.

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Kollmann, Wolfgang. "Navier–Stokes Equations." In Navier-Stokes Turbulence, 17–53. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-31869-7_2.

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Kollmann, Wolfgang. "Introduction." In Navier-Stokes Turbulence, 1–16. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-31869-7_1.

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Kollmann, Wolfgang. "Solution of Hopf-Type Equations in the Spatial Description." In Navier-Stokes Turbulence, 163–77. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-31869-7_10.

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Kollmann, Wolfgang. "Finite-Dimensional Characteristic Functions, Pdfs and Cdfs Based on the Dirac Distribution." In Navier-Stokes Turbulence, 179–201. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-31869-7_11.

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Kollmann, Wolfgang. "Properties and Construction of Mappings." In Navier-Stokes Turbulence, 203–16. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-31869-7_12.

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Kollmann, Wolfgang. "$$\mathcal{M}_1(1)$$: Single Scalar in Homogeneous Turbulence." In Navier-Stokes Turbulence, 217–47. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-31869-7_13.

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Kollmann, Wolfgang. "$$\mathcal{M}_1(N)$$: Mappings for Velocity–Scalar and Position–Scalar Pdfs." In Navier-Stokes Turbulence, 249–67. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-31869-7_14.

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Kollmann, Wolfgang. "Integral Transforms and Spectra." In Navier-Stokes Turbulence, 269–75. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-31869-7_15.

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Тези доповідей конференцій з теми "Navier Stoke"

Clark, William S., and Kenneth C. Hall. "A Time-Linearized Navier-Stokes Analysis of Stall Flutter." In ASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/99-gt-383.

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A computational method for accurately and efficiently predicting unsteady viscous flow through two-dimensional cascades is presented. The method is intended to predict the onset of the aeroelastic phenomenon of stall flutter. In stall flutter, viscous effects significantly impact the aeroelastic stability of a cascade. In the present effort, the unsteady flow is modeled using a time-linearized Navier-Stokes analysis. Thus, the unsteady flow field is decomposed into a nonlinear spatially varying mean flow plus a small-perturbation harmonically varying unsteady flow. The resulting equations that govern the perturbation flow are linear, variable coefficient partial differential equations. These equations are discretized on a deforming, multi-block, computational mesh and solved using a finite-volume Lax-Wendroff integration scheme. Numerical modelling issues relevant to the development of the unsteady aerodynamic analysis, including turbulence modelling, are discussed. Results from the present method are compared to experimental stall flutter data, and to a nonlinear time-domain Navier-Stoke analysis. The results presented demonstrate the ability of the present time-linearized analysis to model accurately the unsteady aerodynamics associated with turbomachinery stall flutter.

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Oyama, Akira, Meng-Sing Liou, and Shigeru Obayashi. "Transonic Axial-Flow Blade Shape Optimization Using Evolutionary Algorithm and Three-Dimensional Navier-Stoke Solver." In 9th AIAA/ISSMO Symposium on Multidisciplinary Analysis and Optimization. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2002. http://dx.doi.org/10.2514/6.2002-5642.

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Korneev, Svyatoslav, and Simona Onori. "Modeling the Transport Dynamics in Gasoline Particulate Filters." In ASME 2018 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/dscc2018-9160.

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We develop the flow and the particulate transport models in a wall-flow gasoline particulate filter (GPF). The filter is constituted of inlet channels which are separated from outlet channels by a porous wall. We model the flow inside the channel using incompressible Navier-Stokes equation coupled with the spatially averaged Navier-Stoke equation for the porous wall. For the particulate transport, we use coupled advection and spatially averaged advection-reaction equations, where the reaction term models the particles trapping. The concentration of deposited particulates at the back of the filter downstream the flow increases with Reynolds number. These results are in agreement with the published experimental measurements of the spatial distribution of particles inside the filter.

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Duque, Earl P. N., Michael D. Burklund, and Wayne Johnson. "Navier-Stokes and Comprehensive Analysis Performance Predictions of the NREL Phase VI Experiment." In ASME 2003 Wind Energy Symposium. ASMEDC, 2003. http://dx.doi.org/10.1115/wind2003-355.

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A vortex lattice code, CAMRAD II, and a Reynolds-Averaged Navier-Stoke code, OVERFLOW-D2, were used to predict the aerodynamic performance of a two-bladed horizontal axis wind turbine. All computations were compared with experimental data that was collected at the NASA Ames Research Center 80-by 120-Foot Wind Tunnel. Computations were performed for both axial as well as yawed operating conditions. Various stall delay models and dynamics stall models were used by the CAMRAD II code. Comparisons between the experimental data and computed aerodynamic loads show that the OVERFLOW-D2 code can accurately predict the power and spanwise loading of a wind turbine rotor.

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Golliard, Joachim, Néstor González-Díez, Stefan Belfroid, Güneş Nakiboğlu, and Avraham Hirschberg. "U-RANS Model for the Prediction of the Acoustic Sound Power Generated in a Whistling Corrugated Pipe." In ASME 2013 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/pvp2013-97385.

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Corrugated pipes, as used in flexible risers for gas production or in domestic appliances, can whistle when a flow is imposed through the pipe. Nakiboğlu et al [1, 2] have developed a method to compute the acoustic source term for axi-symmetric cavities. The method is based on the resolution of incompressible Navier-Stoke equations without turbulence modeling. This is a quasi-laminar flow model. A single cavity in a short pipe is considered with, as inlet boundary condition, a pipe flow with an imposed harmonic velocity perturbation. At low Reynolds numbers most of the effect of the turbulence is accounted by the steady velocity profile imposed at the inlet. However, this model fails when applied to high Reynolds number flows as encountered in gas-transport systems (Re = 106 or higher). In this paper, a modified model, using a 2-D unsteady Reynolds Averaged Navier Stokes turbulent solver, is presented. Turbulence determines the development of the approaching boundary layer and of the shear layer above the cavity. The shear-layer velocity profile controls the acoustic power generated by the cavity in response to the imposed acoustic oscillations. Comparison with experimental results obtained for a single cavity shows that the modification of the method considerably increases its accuracy for a deep cavity.

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Lee, Sungsu, Hak-Sun Kim, Kwang-Hyun Nam, Jae Ik Hong, and Seung Hyun Chun. "Computational and Experimental Study of Effects of Guide Vanes and Tip Clearances on Performances of Axial Flow Fans." In ASME 2004 Heat Transfer/Fluids Engineering Summer Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/ht-fed2004-56288.

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The effects of guide vanes and tip clearances on the characteristics of axial flow fans are investigated both computationally and experimentally. Performance test of fans carried out in full scale shows considerable effects of tip clearance between rotor tip and duct on the characteristics of fans. The tested results are compared with the computation based on the finite volume method to solve the Navier-Stoke equations with k–ε turbulence model. The comparison shows good agreements between experimental and computational results. In addition, the effects of shape of guide vanes are numerically studied. The results shows that increased volume of separated region around the guide vane reduces the recovery of tangential component of kinetic energy in the wake, resulting in loss of efficiency.

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Rahman, M. A., T. Heidrick, and B. Fleck. "Computational Analysis of Effective Microfluidic Mixing Utilizing Surface Heterogeneity Effects." In ASME 2006 2nd Joint U.S.-European Fluids Engineering Summer Meeting Collocated With the 14th International Conference on Nuclear Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/fedsm2006-98564.

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The present work is a numerical simulation of electroosmotic flow (EOF) in a cylindrical microchannel with the variation of wall surface charge (ζ -potential) distributions. The 2D Navier-Stoke equation governing the velocity field and the pressure are solved numerically using the finite element method (FEM). The numerical results show that the distorted electroosmotic velocity profiles and various kinds of flow circulation resulting from the axial variation of the ζ. The influences of heterogeneous patterns of zeta potential on the velocity profile, and the induced pressure distribution are discussed in this paper. This study shows that using heterogeneous patterns of zeta potential over the channel can generate local flow circulations and hence provide effective means to improve the mixing within the microchannels.

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Wolf, Jörg. "A direct proof of the Caffarelli-Kohn-Nirenberg theorem." In Parabolic and Navier–Stokes equations. Warsaw: Institute of Mathematics Polish Academy of Sciences, 2008. http://dx.doi.org/10.4064/bc81-0-34.

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Wrzosek, Dariusz. "Chemotaxis models with a threshold cell density." In Parabolic and Navier–Stokes equations. Warsaw: Institute of Mathematics Polish Academy of Sciences, 2008. http://dx.doi.org/10.4064/bc81-0-35.

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Arkhipova, Arina. "New a priori estimates for nondiagonal strongly nonlinear parabolic systems." In Parabolic and Navier–Stokes equations. Warsaw: Institute of Mathematics Polish Academy of Sciences, 2008. http://dx.doi.org/10.4064/bc81-0-1.

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Звіти організацій з теми "Navier Stoke"

Dartevelle, Sebastian. From model conception to verification and validation, a global approach to multiphase Navier-Stoke models with an emphasis on volcanic explosive phenomenology. Office of Scientific and Technical Information (OSTI), October 2007. http://dx.doi.org/10.2172/948564.

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Martin, Daniel, and Phillip Colella. Incompressible Navier-Stokes with particles algorithm designdocument. Office of Scientific and Technical Information (OSTI), July 2006. http://dx.doi.org/10.2172/926455.

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Srinivasan, G. R., and W. J. McCroskey. Navier-Stokes Calculations of Hovering Rotor Flowfields,. Fort Belvoir, VA: Defense Technical Information Center, August 1987. http://dx.doi.org/10.21236/ada184784.

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Murman, Earll M. Adaptive Navier-Stokes Calculations for Vortical Flows. Fort Belvoir, VA: Defense Technical Information Center, March 1993. http://dx.doi.org/10.21236/ada266236.

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Reed, Helen L. Navier-Stokes Simulation of Boundary-Layer Transition. Fort Belvoir, VA: Defense Technical Information Center, May 1990. http://dx.doi.org/10.21236/ada226351.

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Newman, Christopher K. Exponential integrators for the incompressible Navier-Stokes equations. Office of Scientific and Technical Information (OSTI), July 2004. http://dx.doi.org/10.2172/975250.

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Selvam, R. P., and Zu-Qing Qu. Adaptive Navier Stokes Flow Solver for Aerospace Structures. Fort Belvoir, VA: Defense Technical Information Center, May 2004. http://dx.doi.org/10.21236/ada424479.

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Kilic, M. S., G. B. Jacobs, J. S> Hesthaven, and G. Haller. Reduced Navier-Stokes Equations Near a Flow Boundary. Fort Belvoir, VA: Defense Technical Information Center, August 2005. http://dx.doi.org/10.21236/ada458888.

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Nguyen, Phuc N. Use of Navier-Stokes Analysis in Section Design. Fort Belvoir, VA: Defense Technical Information Center, December 1990. http://dx.doi.org/10.21236/ada242074.

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Elman, Howard, and David Silvester. Fast Nonsymmetric Iterations and Preconditioning for Navier-Stokes Equations. Fort Belvoir, VA: Defense Technical Information Center, June 1994. http://dx.doi.org/10.21236/ada599710.

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