Browsing by Subject "Equacions de Navier-Stokes"
Now showing items 1-20 of 40
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A Chimera method for the incompressible Navier-Stokes equations
(2014-05-30)
Article
Restricted access - publisher's policyThe Chimera method was developed three decades ago as a meshing simplification tool. Different components are meshed independently and then glued together using a domain decomposition technique to couple the equations ... -
A flux-free a posteriori error estimator for the incompressible Stokes problem using a mixed FE formulation
(2010-08-01)
Article
Open AccessIn this contribution, we present an a posteriori error estimator for the incompressible Stokes problem valid for a conventional mixed FE formulation. Due to the saddle-point property of the problem, conventional error ... -
Anàlisi de sensibilitat per un model geofísic
(Universitat Politècnica de Catalunya, 2016-09-22)
Bachelor thesis
Restricted access - author's decisionLes mesures geològiques per identificar paràmetres geofísics es comparen amb el resultat de models numèrics. En particular, per identificar estructures geològiques en escales de l'ordre dels 1000 km, es fan servir models ... -
Analysis of the discontinuous Galerkin interior penalty method with solenoidal approximations for the stokes equations
(2014)
Article
Open AccessThe discontinuous Galerkin Interior Penalty Method with solenoidal approximations proposed in [13] for the incompressible Stokes equations is analyzed. Continuity and coercivity of the bilinear form are proved. A priori ... -
An efficient spectral code for incompressible flows in cylindrical geometries
(2010-02)
Article
Restricted access - publisher's policyAn efficient and accurate numerical scheme is proposed to solve the incompressible Navier–Stokes equations in a bounded cylinder. The scheme is based on a projection method formulated in primitive variables to maintain the ... -
An explicit/implicit Runge–Kutta-based PFEM model for the simulation of thermally coupled incompressible flows
(Springer, 2019-02)
Article
Restricted access - publisher's policyA semi-explicit Lagrangian scheme for the simulation of thermally coupled incompressible flow problems is presented. The model relies on combining an explicit multi-step solver for the momentum equation with an implicit ... -
A numerical strategy to compute optical parameters in turbulent flow: application to telescopes
(2010-01)
Article
Open AccessWe present a numerical formulation to compute optical parameters in a turbulent air flow. The basic numerical formulation is a large eddy simulation (LES) of the incompressible Navier–Stokes equations, which are approximated ... -
A portable OpenCL-based unstructured edge-based Finite Element Navier-Stokes solver on graphics hardware
(Elsevier, 2013-07)
Article
Open AccessThe rise of GPUs in modern high-performance systems increases the interest in porting portion of codes to such hardware. The current paper aims to explore the performance of a portable state-of-the-art FE solver on GPU ... -
Application of the finite point method to high- Reynolds number compressible flow problems
(2014-04-10)
Article
Restricted access - publisher's policyIn this work, the finite point method is applied to the solution of high-Reynolds compressible viscous flows. The aim is to explore this important field of applications focusing on two main aspects: the easiness and ... -
Convergence towards weak solutions of the Navier-Stokes equations for a finite element approximation with numerical subgrid scale modeling
(2012)
External research report
Open AccessResidual-based stabilized nite element techniques for the Navier-Stokes equations lead to numerical discretizations that provide convection stabilization as well as pressure stability without the need to satisfy an inf-sup ... -
Coupling Biot and Navier-Stokes problems for fluid-poroelastic structure interaction
(2008-02-05)
Article
Open AccessThe interaction between a fluid and a poroelastic structure is a complex problem that couples the Navier-Stokes equations for the fluid with the Biot system for the structure. The finite element approximation of this problem ... -
Development of software for the study of fluid dynamics. Aerodynamical applications
(Universitat Politècnica de Catalunya, 2014-09)
Master thesis (pre-Bologna period)
Open AccessCatalà: El present projecte te com a objectiu la creació d’un software propi, utilitzant el llenguatge de programació C++, que permeti resoldre les Equacions de Navier-Stokes de forma numèrica mitjançant la resolució per ... -
Discontinuous Galerkin methods for the Stokes equations using divergence-free approximations
(2008-07)
Article
Open AccessA discontinuous Galerkin (DG) method with solenoidal approximation for the simulation of incompressible flow is proposed. It is applied to the solution of the Stokes equations. The interior penalty method is employed to ... -
Error analysis of discontinuous Galerkin methods for Stokes problem under minimal regularity
(2012)
External research report
Open AccessIn this article, we analyze several discontinuous Galerkin methods (DG) for the Stokes problem under the minimal regularity on the solution. We assume that the velocity u belongs to [H1 0 ()]d and the pressure p 2 L2 0 ... -
Hybrid MPI+OpenMP parallelization of a Navier-Stokes solver for large-scale DNS
(2011)
Conference lecture
Restricted access - publisher's policyThis work presents a parallel Navier-Stokes solver for the large-scale direct numerical simulation (DNS) of incompressible flows with one periodic direction. It is based on a scalable Poisson solver that combines an FFT ... -
Implementation of finite element solvers for the compressible navier-stokes equations
(Universitat Politècnica de Catalunya, 2015-07-03)
Master thesis
Open Access -
Local preconditioning and variational multiscale stabilization for Euler compressible steady flow
(Elsevier, 2016)
Article
Open AccessThis paper introduces a preconditioned variational multiscale stabilization (P-VMS) method for compressible flows. In this introductory paper we focus on inviscid flow and steady state problems. The Euler equations are ... -
Long term stability estimates and existence of a global attractor in a finite element approximation of the Navier-Stokes equations with numerical sub-grid scale modeling
(2012)
Conference report
Open AccessVariational multiscale methods lead to stable finite element approximations of the Navier-Stokes equations, both dealing with the indefinite nature of the system (pressure stability) and the velocity stability loss for ... -
Long-term stability estimates and existence of a global attractor in a finite element approximation of the Navier-Stokes equations with numerical sub-grid scale modeling
(2009-08-01)
Article
Open AccessVariational multiscale methods lead to stable finite element approximations of the Navier-Stokes equations, both dealing with the indefinite nature of the system pressure stability) and the velocity stability loss for high ... -
Low Mach Navier-Stokes equations on unstructured meshes
(2012)
Conference report
Restricted access - publisher's policyNumerical methods for fluxes with strong density variations but with speeds much lower than the sound speed, known as low Mach flows, present some particularities with respect to incompressible formulations. Despite ...
