Browsing by Subject "Equacions de Navier-Stokes"
Now showing items 1-20 of 99
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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
Open AccessIn 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
(2021-07)
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 ... -
A VMS–based fractional step technique for the compressible Navier–Stokes equations using conservative variables
(2022-06)
Article
Restricted access - publisher's policyIn this paper we address the compressible Navier–Stokes equations written in the so-called conservative formulation. In particular, we focus on the possibility of uncoupling the computation of the problem unknowns, namely, ... -
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 using the fractional step method
(Universitat Politècnica de Catalunya, 2022-10-21)
Master thesis
Open AccessDifferent aspects related to Computational Fluid Dynamics (CDF) will be studied. First, theoretical aspects needed for the resolution of this kind of problems with the finite element method are reviewed. Then, the heat ... -
Advanced study for the numerical resolution of the Navier-Stokes equations. Application to thermal energy storage systems
(Universitat Politècnica de Catalunya, 2022-07-19)
Master thesis
Open AccessThe resolution of the Navier Stokes equations in three dimensions in a turbulent regime applying turbulence models is studied. To accomplish this objective, it is done a brief introduction to the work done on the Final ... -
Advanced study for the numerical resolution of the Navier-Stokes equations. Application to turbulent flows in air curtains
(Universitat Politècnica de Catalunya, 2023-07-11)
Master thesis
Open AccessEl present treball exposa un estudi avançat de la resolució numèrica de les equacions multidimensionals de Navier-Stokes mitjançant mètodes computacionals. El projecte ha constat d’un detallat anàlisi teòric, a partir del ... -
Advanced study for the numerical resolution of the Navier-Stokes equations. Applications to mass transport phenomena and combustion modelling with parallel programming
(Universitat Politècnica de Catalunya, 2022-06-27)
Master thesis
Open AccessThe present thesis consists on the computational study and development of a 3D reactive flows solver. The main objective is the creation of C++ programming codes able to simulate the combustion chemical reactions. To do ... -
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. Applications to the industrial and aerodynamic fields: Case MD2
(Universitat Politècnica de Catalunya, 2023-02-06)
Master thesis
Open AccessEl treball consisteix en el desenvolupament de codis en C++ per a la resolució de les equacions multidimensionals de Navier-Stokes, el que es coneix com a CFD (“Computational Fluid Dynamics”). A través de l’ús de mètodes ... -
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 ...
