Browsing by Subject "Equacions de Navier-Stokes"
Now showing items 1-20 of 77
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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 contribution to the finite element analysis of high-speed compressible flows and aerodynamics shape optimization
(Universitat Politècnica de Catalunya, 2013-09-30)
Doctoral thesis
Open AccessThis work covers a contribution to two most interesting research elds in aerodynamics, the fi nite element analysis of high-speed compressible flows (Part I) and aerodynamic shape optimization (Part II). The fi rst part ... -
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 ... -
A numerical formulation to solve the ALE Navier-Stokes equations applied to the withdrawal of magma chambers
(Universitat Politècnica de Catalunya, 2000-05-17)
Doctoral thesis
Open AccessLa tesis presenta un algoritmo para la resolución de las ecuaciones de Navier-Stokes con acoplamiento mecánico en el contexto del método de los elementos finitos. La solución de la versión ALE de las ecuaciones de Navier-Stokes ... -
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 ... -
A posteriori error estimates in a finite element VMS-based reduced order model for the incompressible Navier-Stokes equations
(2021-03)
Article
Restricted access - publisher's policyIn this paper we present an a posteriori error estimate for a reduced order model (ROM) for the incompressible Navier-Stokes equations that is based on the fact that the full order model is a finite element (FE) approximation. ... -
A time averaged steady state method for the Navier-Stokes equations
(2021-02)
Article
Open AccessThis work derives an incompressible Variational Multiscales time-averaged Navier-Stokes formulation that aims at obtaining accurate steady state solutions. Rather than using the standard time instantaneous velocity and ... -
Active flow control in aerodynamic applications.
(Universitat Politècnica de Catalunya, 2020-04)
Master thesis
Restricted access - author's decisionThe focus of this thesis is to determine the e ect of Active Flow Control ( AFC from now), studying, analyzing the behavior of airfoil and afterwards, implementing AFC and evaluate its impact on aerodynamic performance. ... -
Advanced study for the numerical approximation of Navier-Stokes equations by implementation of a finite volume solver
(Universitat Politècnica de Catalunya, 2019-10)
Bachelor thesis
Restricted access - author's decision
Covenantee: Rheinisch-Westfälische Technische Hochschule AachenThe objective of the thesis is to build different fluid solvers from scratch, whereby the following three cases are considered: Resolution of diffusion problems, convection-diffusion and Navier-Stokes equations. In the ... -
Advanced study for the numerical resolution of the Navier-Stokes equations. Applications to the industrial and aerodynamic fields: Case 80A
(Universitat Politècnica de Catalunya, 2019-06)
Master thesis
Restricted access - author's decisionThe main objective of this work is to study interesting cases related to mechanics of fluids and heat transfer: they have studied two cases to validate the discrete diffusion equation by convection in laminar regime, they ... -
Advanced study for the numerical resolution of the Navier-Stokes equations. Particular case: thermal comfort
(Universitat Politècnica de Catalunya, 2021-02-12)
Master thesis
Open AccessThis report aspires to deepen in the field of Computational Fluid Dynamics (CFD) and detail the steps to convert a physical phenomenon into a solvable domain. Four parts can be clearly differenced along this thesis. First, ... -
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, 2020-01)
Article
Open AccessA 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 ... -
Analysis of fractional step, finite element methods for the incompressible Navier-Stokes equations
(Universitat Politècnica de Catalunya, 1997-03-07)
Doctoral thesis
Open AccessEn la presente tesis se han estudiado métodos de paso fraccionado para la resolución numérica de la ecuación de Navier-Stokes incompresible mediante el método de los elementos finitos; dicha ecuación rige el movimiento de ... -
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 ... -
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 ... -
Application of the finite point method to high- Reynolds number compressible flow problems
(2014-04)
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 ... -
Computational resolution of the Navier-Stokes equations for laminar and turbulents flows. Implementation of the Sparlart-Allmaras turbulence model
(Universitat Politècnica de Catalunya, 2020-07-03)
Bachelor thesis
Open AccessThe present project consists on the computational study and resolution of the Navier-Stokes equations and the physical phenomena involved. The main objective is the development of C++ programming codes to solve flow’s ... -
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 ...
