Exploració per tema "Fluid dynamics--Mathematical models"
Ara es mostren els items 21-40 de 41
-
Incompressible Navier-Stokes solver in Python
(Universitat Politècnica de Catalunya, 2021-06-22)
Projecte Final de Màster Oficial
Accés obertThe use of numerical methods to solve flow dynamics problems has been a major issue of study since the fifties of the last century. The need of developing high performance military planes produced the discovery of a very ... -
Logarithmic conformation reformulation in viscoelastic flow problems approximated by a VMS-type stabilized finite element formulation
(2019-09)
Article
Accés obertThe log-conformation reformulation, originally proposed by Fattal and Kupferman (2004), allows computing incompressible viscoelastic problems with high Weissenberg numbers which are impossible to solve with the typical ... -
Numerical simulation of multifluid flows with the particle finite element method
(International Centre for Numerical Methods in Engineering (CIMNE), 2010)
Llibre
Accés obertIn this monograph we have focused on understanding the basic physical principles of multi-fluid flows and the difficulties that arise in their numerical simulation. We have extended the Particle Finite Element Method to ... -
Numerical simulation of non-isothermal viscoelastic fluid flows using a VMS stabilized finite element formulation
(2021-10)
Article
Accés obertThe effect of temperature in viscoelastic fluid flows is studied applying a stabilized finite element formulation based on both a standard and a log-conformation reformulation (LCR), and the Variational Multiscale (VMS) ... -
On the effect of standard PFEM remeshing on volume conservation in free-surface fluid flow problems
(Springer, 2017-07)
Article
Accés obertThe aim of this work is to analyze the remeshing procedure used in the particle finite element method (PFEM) and to investigate how this operation may affect the numerical results. The PFEM remeshing algorithm combines the ... -
On the entrainment coefficient in a forced plume: quantitative effects of source parameter
(University of Thechnology and Agriculture Nicholas Copernicus University, 2014-02-24)
Article
Accés obertThe behavior of a forced plume is mainly controlled by the source buoyancy and momentum fluxes and the efficiency of turbulent mixing between the plume and the ambient fluid (stratified or not). The interaction between the ... -
On the simulation of flows with violent free surface motion
(American Institute of Aeronautics and Astronautics (AIAA), 2006)
Text en actes de congrés
Accés obert -
On the validation of the particle finite element method (PFEM) for complex engineering fluid flow problems
(TU Delft, 2006)
Text en actes de congrés
Accés restringit per política de l'editorialSeveral comparisons between experiments and computational models are presented in the following pages. The objective is to verify the ability of Particle Finite Elements Methods (PFEM) [1] [2] to reproduce hydraulic phenomena ... -
Pseudo-divergence-free element free Galerkin method for incompressible fluid flow
(2004-03)
Article
Accés obertIncompressible modeling in finite elements has been a major concern since its early developments and has been extensively studied. However, incompressibility in mesh-free methods is still an open topic. Thus, instabilities ... -
Pseudoplastic fluid flows for different Prandtl numbers: steady and time-dependent solutions
(2019-11)
Article
Accés obertIn this work, a variational multiscale (VMS) finite element formulation is used to approximate numerically the natural convection in square cavity with differentially heated from sidewalls problem for Newtonian and power-law ... -
Reduced order models for thermally coupled low Mach flows
(Springer, 2018-12)
Article
Accés obertIn this paper we present a collection of techniques used to formulate a projection-based reduced order model (ROM) for zero Mach limit thermally coupled Navier–Stokes equations. The formulation derives from a standard ... -
Simulation of flows with violent free surface motion and moving objects using unstructured grids
(2007-03)
Article
Accés obertA volume of fluid (VOF) technique has been developed and coupled with an incompressible Euler/Navier–Stokes solver operating on adaptive, unstructured grids to simulate the interactions of extreme waves and three-dimensional ... -
Size effect on the hydraulic behavior of fluid flow through a single rough-walled fracture
(Elsevier, 2021-04)
Article
Accés obertThis study provides a numerical approach to evaluate the effect of sample sizes on fluid flow through a single rough-walled fracture. The rough-walled fracture was generated by using mathematical statistics. Its aperture ... -
Spectrally-consistent regularization of turbulent Rayleigh-Bénard convection
(International Association for Computational Mechanics (IACM), 2014)
Text en actes de congrés
Accés restringit per política de l'editorialDirect numerical simulation (DNS) of turbulent Rayleigh-Bénard convection in an air filled (Pr = 0,7) rectangular cell of squared cross-section with periodic boundary conditions in the span-wise direction, has been carried ... -
Stationary and time-dependent numerical approximation of the lid-driven cavity problem for power-law fluid flows at high Reynolds numbers using a stabilized finite element formulation of the VMS type
(2018-07)
Article
Accés obertIn this work, a variational multiscale finite element formulation is used to approximate numerically the lid-driven cavity flow problem for high Reynolds numbers. For Newtonian fluids, this benchmark case has been extensively ... -
Study for the computational resolution of conservation equations of mass, momentum and energy. Possible application to different aeronautical and industrial engineering problems: Case 1A.
(Universitat Politècnica de Catalunya, 2017-06-10)
Treball Final de Grau
Accés restringit per decisió de l'autorThis project deals with the numerical simulation of the Navier-Stokes equations for different cases. By computing several benchmark cases, the code is tested and improved in order to compute more difficult cases such as ... -
Study for the computational resolution of conservation equations of mass, momentum and energy. Possible application to different aeronautical and industrial engineering problems: Case 5A.
(Universitat Politècnica de Catalunya, 2017-06-10)
Treball Final de Grau
Accés restringit per decisió de l'autorThe numerical simulation of the RAE2822 aerofoil under transonic flow conditions (including shock-induced separation at the upper surface) has been performed using unsteady Reynolds-averaged numerical simulation (URANS), ... -
Study of numerical methods for the solution of compressible external flows
(Universitat Politècnica de Catalunya, 2015-04)
Projecte/Treball Final de Carrera
Accés obertIn this study a Computational Fluid Dynamics (CFD) code to solve the two-dimensional subsonic flow around simple geometry airfoils is developed. The presented method departs from the Euler equations and through a finite-volume ... -
The particle finite element method for multi-fluid flows
(Springer, 2011)
Capítol de llibre
Accés restringit per política de l'editorialThis paper presents the Particle Finite Element Method (PFEM) and its application to multi-fluid flows. Key features of the method are the use of a Lagrangian description to model the motion of the fluid particles (nodes) ... -
Three dimensional modeling of liquid droplet spreading on solid surface: an enriched finite element/level-set approach
(2021-10)
Article
Accés obertA physically consistent approach is introduced to simulate dynamics of droplets in contact with solid substrates. The numerical method is developed by introducing the molecular–kinetic model within the framework of the ...