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Dissertations / Theses on the topic 'Viscous flow Viscous flow Finite element method'

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Published: 4 June 2021

Last updated: 1 February 2022

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1

Fithen, Robert Miller. "Adaptive finite element simulation of incompressible viscous flow." Diss., This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-06062008-170423/.

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2

Zhou, Hao. "A mass-weighted upwind-based control volume finite-element method for steady two-dimensional viscous compressible flows." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq25905.pdf.

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3

Coggins, Patrick. "Mixed hp-finite element methods for viscous incompressible fluid flow." Thesis, University of Leicester, 2000. http://hdl.handle.net/2381/30511.

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The efficient numerical approximation of viscous, incompressible flow by families of mixed finite elements is subject to the satisfaction of a stability or inf-sup condition between the velocity and pressure approximation spaces. The present work analyses the stability of mixed hp-finite elements for planar Stokes flow on affine quadrilateral meshes comprising of regular and anisotropic elements. Firstly, a new family of mixed hp-finite elements is presented for regular elements with an inf-sup constant bounded below independently of the mesh size h and the spectral order p. In particular, the

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4

Taha, Wael. "Simulation of unsteady 3-D viscous compressible propeller flow by finite element method." Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=80145.

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The flow produced by a rotating propeller is inherently unsteady and three-dimensional. Conventional design of propellers uses blade-element theory but becomes inaccurate in capturing three-dimensional vortical and compressible effects at the tips, as well as the effect on downstream bodies. A propeller is always attached to a fixed component that affects its performance, thus the need arises to couple a fixed domain to a rotating domain in an unsteady aerodynamic simulation. A finite element formulation for the simulation of propellers is presented in terms of the Reynolds-averaged Nav

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5

Pringle, Matthew. "Fnite [sic] element modelling of two-component, solid-liquid mixtures /." *McMaster only, 2001.

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6

Sleiman, Mohamad. "Simulation of 3-D viscous compressible flow in multistage turbomachinery by finite element methods." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0001/NQ39027.pdf.

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7

Aland, Sebastian, Sabine Egerer, John Lowengrub, and Axel Voigt. "Diffuse interface models of locally inextensible vesicles in a viscous fluid." Elsevier, 2014. https://htw-dresden.qucosa.de/id/qucosa%3A32307.

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We present a new diffuse interface model for the dynamics of inextensible vesicles in a viscous fluid with inertial forces. A new feature of this work is the implementation of the local inextensibility condition in the diffuse interface context. Local inextensibility is enforced by using a local Lagrange multiplier, which provides the necessary tension force at the interface. We introduce a new equation for the local Lagrange multiplier whose solution essentially provides a harmonic extension of the multiplier off the interface while maintaining the local inextensibility constraint near the i

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8

Dechamps, Xavier. "Numerical simulation of incompressible magnetohydrodynamic duct and channel flows by a hybrid spectral, finite element solver." Doctoral thesis, Universite Libre de Bruxelles, 2014. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209203.

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In this dissertation, we are concerned with the numerical simulation for flows of electrically conducting fluids exposed to an external magnetic field (also known as magnetohydrodynamics or in short MHD). The aim of the present dissertation is twofold. First, the in-house CFD hydrodynamic solver SFELES is extended to MHD problems. Second, MHD turbulence is studied in the simple configuration of a MHD pipe flow within an external transverse magnetic field. Chapter 2 of this dissertation aims at reminding the physical equations that govern incompressible MHD problems. Two equivalent formulations

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9

Bonhaus, Daryl Lawrence. "A Higher Order Accurate Finite Element Method for Viscous Compressible Flows." Diss., Virginia Tech, 1998. http://hdl.handle.net/10919/29458.

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The Streamline Upwind/Petrov-Galerkin (SU/PG) method is applied to higher-order finite-element discretizations of the Euler equations in one dimension and the Navier-Stokes equations in two dimensions. The unknown flow quantities are discretized on meshes of triangular elements using triangular Bezier patches. The nonlinear residual equations are solved using an approximate Newton method with a pseudotime term. The resulting linear system is solved using the Generalized Minimum Residual algorithm with block diagonal preconditioning. The exact solutions of Ringleb flow and Couette flow are use

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10

Sampaio, Paulo Augusto Berquó de, and Instituto de Engenharia Nuclear. "Petrov - galerkin finite element formulations for incompressible viscous flows." Instituto de Engenharia Nuclear, 1991. http://carpedien.ien.gov.br:8080/handle/ien/1954.

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Submitted by Marcele Costal de Castro (costalcastro@gmail.com) on 2017-10-04T17:13:38Z No. of bitstreams: 1 PAULO AUGUSTO BERQUÓ DE SAMPAIO D.pdf: 6576641 bytes, checksum: 71355f6eedcf668b2236d4c10f1a2551 (MD5)<br>Made available in DSpace on 2017-10-04T17:13:38Z (GMT). No. of bitstreams: 1 PAULO AUGUSTO BERQUÓ DE SAMPAIO D.pdf: 6576641 bytes, checksum: 71355f6eedcf668b2236d4c10f1a2551 (MD5) Previous issue date: 1991-09<br>The basic difficulties associated with the numerical solution of the incompressible Navier-Stokes equations in primitive variables are identified and analysed. These diffi

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11

Singh, Rajesh Kumar. "Finite element analysis of periodic viscous flow in a constricted pipe." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/28063.

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The finite element method is extended to analyze axisymmetric periodic viscous flow in a constricted pipe. This method is used to solve the pulsatile fluid flow through an artery which may be stenosed due to impingement of extravascular masses or due to intravascular atherosclerotic plaques developed at the wall of the artery. The artery geometry is approximated as an axisymmetric channel. Blood is assumed to be a Newtonian fluid, i.e., it follows a linear relationship between the rate of shear strain and the shear stress. The numerical model uses the finite element method based on velocity-p

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12

Hookey, Neil A. (Neil Alexander). "A control volume finite-element method for steady two-dimensional viscous compressible flows /." Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=74308.

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The formulation and implementation of a control volume finite-element method (CVFEM) for steady, two-dimensional, viscous compressible and incompressible internal flows is reported in this thesis. In the development of this method, a CVFEM for steady, quasi-one-dimensional, viscous compressible flows was also formulated. The proposed method is an equal-order colocated shock capturing formulation, which incorporates adaptive grid techniques to discretize calculation domains with triangular elements and provide local grid refinement in the vicinity of strong gradients. Polygonal control volumes

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13

Dolan, P. S. "Viscous incompressible flow solutions via divergence free least squares finite element optimisation." Thesis, University of Hertfordshire, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377903.

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14

Maillot, Isabelle. "Simulation du remplissage/compactage pour la mise en forme des thermoplastiques par injection : applications industrielles." Université Joseph Fourier (Grenoble ; 1971-2015), 1993. http://www.theses.fr/1993GRE10029.

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Ce travail porte sur la modelisation des phases de remplissage et de compactage dans le procede de mise en forme des thermoplastiques par injection. Le but de notre etude est d'etablir un modele unique pour calculer l'ecoulement du polymere fondu dans la cavite refroidie de l'empreinte en tenant compte de la compressibilite des le debut du remplissage, de sorte que le compactage dans les zones remplies est simule sans rupture de modele. Le probleme instationnaire est non lineaire par le frot couplage des equations entre elles et par la variabilite des proprietes physiques (viscosite non newton

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15

Gotsis, Alexandros Dionysios. "Finite element simulation of visoelastic flow: Effect of the rhelogical model and the mesh." Diss., Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/49783.

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16

Ravikumar, Devaki. "2D Compressible Viscous Flow Computations Using Acoustic Flux Vector Splitting (AFVS) Scheme." Thesis, Indian Institute of Science, 2001. http://hdl.handle.net/2005/277.

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The present work deals with the extension of Acoustic Flux Vector Splitting (AFVS) scheme for the Compressible Viscous flow computations. Accurate viscous flow computations require much finer grids with adequate clustering of grid points in certain regions. Viscous flow computations are performed on unstructured triangulated grids. Solving Navier-Stokes equations involves the inviscid Euler part and the viscous part. The inviscid part of the fluxes are computed using the Acoustic Flux Vector Splitting scheme and the viscous part which is diffusive in nature does not require upwinding and is ta

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17

Basa, Mustafa Mazhar. "Determination Of Computational Domain Boundaries For Viscous Flow Around Two Dimensional Bodies." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607878/index.pdf.

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Borders of flow field around immersed bodies can be extended to long distances since there are no physical boundaries. In computational practice however, the flow domain must be restricted to a reasonable size by imposing appropriate boundary conditions at the edges of the computational space. In this thesis work, streamlines obtained from potential flow solution in a relatively large spatial domain are utilized to specify the boundaries and boundary conditions for a more restricted computational domain to be used for detailed viscous flow computations. A grid generation code is adopted for ge

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18

Goktolga, Mustafa Ugur. "Simulation Of Conjugate Heat Transfer Problems Using Least Squares Finite Element Method." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614787/index.pdf.

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In this thesis study, a least-squares finite element method (LSFEM) based conjugate heat transfer solver was developed. In the mentioned solver, fluid flow and heat transfer computations were performed separately. This means that the calculated velocity values in the flow calculation part were exported to the heat transfer part to be used in the convective part of the energy equation. Incompressible Navier-Stokes equations were used in the flow simulations. In conjugate heat transfer computations, it is required to calculate the heat transfer in both flow field and solid region. In this study,

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19

ARAUJO, JOSÉ HENRIQUE CARNEIRO DE. "NUMERICAL SIMULATIONS VIA FINITE ELEMENT OF VISCOUS FLOW BETWEEN CONCENTRIC AND ECCENTRIC CYLINDERS WITH ROTATING INNER AND VARIABLE VISCOSITY." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1987. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=19059@1.

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COMISSÃO NACIONAL DE ENERGIA NUCLEAR<br>Efetuou-se um estudo numérico do escoamento entre cilindros concêntricos e excêntricos girantes com efeitos de dissipação viscosa presente. Assumiu-se que o cilindro interno estava girando com uma velocidade angular constante e que o externo estava fixo. Assumimos a condição de contorno de não deslizamento para velocidade em ambas as paredes. A temperatura do fluido nas paredes dos cilindros foi assumida constante e seu campo assumimos ser governado por efeitos de convecção e condução, com uma fonte de energia proveniente da dissipação viscosa do escoame

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20

Lima, João de Sá Brasil. "Cálculo de sensibilidades geométricas e não-geométricas para escoamentos viscosos incompressíveis utilizando o método adjunto." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/3/3150/tde-05122017-142205/.

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Problemas de otimização se fazem cada vez mais presentes nos mais diversos ramos da Engenharia. Encontrar configurações ótimas para um determinado problema significa, por exemplo, melhorar desempenho, reduzir custos entre outros ganhos. Existem hoje diversas maneiras de atacar um problema de otimização, cada qual com suas particularidades, vantagens e desvantagens. Dentre os métodos de otimização que utilizam gradientes de sensibilidade, o cálculo numérico dos mesmos consiste em uma importante etapa do projeto que, dependendo do problema, pode acarretar em custos computacionais muito elevados

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21

Maitre, Emmanuel. "Sur une classe d'équations à double non linéarité : application à la simulation numérique d'un écoulement visqueux compressible." Phd thesis, Université Joseph Fourier (Grenoble), 1997. http://tel.archives-ouvertes.fr/tel-00004955.

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L'origine de ce travail est l'étude d'un problème industriel sur la mise en forme des thermoplastiques par injection. Nous nous sommes concentrés sur la partie remplissage du moule et sur la détermination de la position du front du polymère. Le travail présenté dans cette thèse comprend donc deux parties: => L'étude mathématique et numérique de l'équation en pression qui régit l'écoulement du polymère fondu. A partir de cet exemple nous avons mis en évidence et étudié une famille nouvelle d'équations à double non linéarité. => La détermination de l'interface polymère-air par des méthodes de su

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22

Perron, Sébastien. "Résolution numérique d'écoulements 3 dimensions avec une nouvelle méthode de volumes finis pour maillages non structurés /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 2001. http://theses.uqac.ca.

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23

Dutto, Laura Cecilia. "Etude de préconditionnements pour la résolution, par la méthode des éléments finis, des équations de Navier-Stokes pour un fluide compressible." Paris 6, 1990. http://www.theses.fr/1990PA066489.

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On etudie la simulation numerique de l'ecoulement d'un fluide visqueux compressible autour d'un obstacle dans le plan, modelise par les equations de navier-stokes, ecrites sous forme non conservative. On utilise une approche instationnaire des equations, meme quand il s'agit d'obtenir une solution stationnaire. La discretisation centree en espace est realisee au moyen des methodes d'elements finis conformes, en utilisant, pour les differentes variables, des espaces d'approximation compatibles. La discretisation en temps est faite a l'aide des schemas totalement implicites. On propose deux form

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24

Brandely, Anaïs. "Étude du ballottement de fluide dans les réservoirs à carburant : approches numérique et expérimentale." Thesis, Compiègne, 2016. http://www.theses.fr/2016COMP2274/document.

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L’émergence de bruits auparavant inaudibles dans les réservoirs à carburants automobiles requiert des constructeurs une meilleure compréhension des phénomènes physiques intervenants au sein de leurs produits. Dans cette thèse, différents travaux ont été conduits autour de l’étude du ballottement de fluide dans une cuve rigide rectangulaire partiellement remplie de fluide et soumise à une excitation extérieure. La première partie présente un état de l’art sur le sloshing suivant trois approches complémentaires - approche analytique, approche numérique et approche expérimentale - permettant d’or

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25

Kirk, Benjamin Shelton. "Adaptive finite element simulation of flow and transport applications on parallel computers." Thesis, 2007. http://hdl.handle.net/2152/3115.

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26

Kirk, Benjamin Shelton 1978. "Adaptive finite element simulation of flow and transport applications on parallel computers." 2007. http://hdl.handle.net/2152/13302.

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27

Stradins, Linards. "Simulating the flow of multi-domain/multi-viscous polymer blends during polymer processing using the boundary element method." 1993. http://catalog.hathitrust.org/api/volumes/oclc/32485953.html.

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Thesis (M.S.)--University of Wisconsin--Madison, 1993.<br>Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 64-66).

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28

Munikrishna, N. "On Viscous Flux Discretization Procedures For Finite Volume And Meshless Solvers." Thesis, 2007. http://hdl.handle.net/2005/471.

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This work deals with discretizing viscous fluxes in the context of unstructured data based finite volume and meshless solvers, two competing methodologies for simulating viscous flows past complex industrial geometries. The two important requirements of a viscous discretization procedure are consistency and positivity. While consistency is a fundamental requirement, positivity is linked to the robustness of the solution methodology. The following advancements are made through this work within the finite volume and meshless frameworks. Finite Volume Method: Several viscous discretization proce

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29

Ivan, Lucian. "Development of High-order CENO Finite-volume Schemes with Block-based Adaptive Mesh Refinement (AMR)." Thesis, 2011. http://hdl.handle.net/1807/29759.

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A high-order central essentially non-oscillatory (CENO) finite-volume scheme in combination with a block-based adaptive mesh refinement (AMR) algorithm is proposed for solution of hyperbolic and elliptic systems of conservation laws on body- fitted multi-block mesh. The spatial discretization of the hyperbolic (inviscid) terms is based on a hybrid solution reconstruction procedure that combines an unlimited high-order k-exact least-squares reconstruction technique following from a fixed central stencil with a monotonicity preserving limited piecewise linear reconstruction algorithm. The limit

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