Exploració per tema "Dinàmica de fluids"
Ara es mostren els items 21-40 de 364
-
A new tool for the practical simulation of fluid-structure interaction problems
(Universitat Politècnica de Catalunya, 2009-06-23)
Tesina
Accés obertLa interacció fluid-estructura és un exemple clàssic de problema acoblat resolt mitjançant el mètode d'elements finits. Aquesta tesina l'estudia tant des d'un punt de vista teòric com pràctic. Des del vessant pràctic, es ... -
A novel method to determine the discharge coefficient of constant section nozzles under compressible dynamic flow conditions
(2019-07)
Article
Accés restringit per política de l'editorialThe present paper introduces a novel transient experimental method employed to determine the discharge coefficient of constant section nozzles of small diameters of 1 to 3 mm and with a length/diameter ratio of around one. ... -
A numerical investigation of laminar flow over a backward facing inclined step
(2016-08)
Article
Accés obertThe aim of the present study is to analyze the two dimensional flow over a backward-facing-inclined step in laminar flow regime. The inspiration for the present work is derived from the fact that in automobile industry, ... -
A numerical investigation of wake and mixing layer interactions of flow past a square cylinder
(2016-02-26)
Article
Accés obertThe aim of the present study is to simulate and analyze the interaction of two dimensional flow past a square cylinder in a laminar regime with an upstream mixing layer developed by an axis symmetrical horizontal splitter ... -
A numerical simulation of fluid-structure interaction for flow through valves of a hermetic compressor with immersed boundary method
(2012)
Text en actes de congrés
Accés restringit per política de l'editorial -
A Phase-field model study of two-dimensional dendritc growth in thermal solidification processes
(Universitat Politècnica de Catalunya, 2008-06-19)
Projecte Final de Màster Oficial
Accés obertA phasefield model in two dimensions with both surface energy and kinetic anisotropies is used to simulate dendritic solidification of a pure material from its undercooled melt. Two finite differences methods have been ... -
A playground for compressible natural convection with a nearly uniform density
(Cambridge University Press, 2022-06-10)
Article
Accés obertIn the quest to understand the basic universal features of compressible convection, one would like to disentangle genuine consequences of compression from spatial variations of transport properties. For instance, one may ... -
A priori study of subgrid-scale features in turbulent Rayleigh-Bénard convection
(2017-10-06)
Article
Accés obertAt the crossroad between flow topology analysis and turbulence modeling, a priori studies are a reliable tool to understand the underlying physics of the subgrid-scale (SGS) motions in turbulent flows. In this paper, ... -
A second-order semi-lagrangian particle finite element method for fluid flows
(Springer, 2019-01-01)
Article
Accés obertIn this paper, a second-order SL-PFEM scheme for solving the incompressible Navier–Stokes equations is presented. This scheme is based on the second-order velocity Verlet algorithm, which uses an explicit integration for ... -
A semi-analytical model for droplet dynamics on the GDL surface of a PEFC electrode
(2015-04)
Article
Accés obertWater management is one of the key factors in Proton Exchange Fuel Cell (PEFC) performance. The water produced within the fuel cell is evacuated through the gas channels, but at high current densities water can block the ... -
A simple approach to discretize the viscous term with spatially varying (eddy-)viscosity
(2013-11-15)
Article
Accés restringit per política de l'editorialA simple approach to discretize the viscous dissipation term in the incompressible Navier–Stokes equations with spatially varying viscosity is presented. Unlike the case where the viscosity remains constant, its discretization ... -
A stabilized finite element method for incompressible viscous flows using a finite increment calculus formulation
(1999-02)
Report de recerca
Accés obertA stabilized finite element formulation for incompressible viscous flows is derived. The starting point are the modified Navier-Stokes equations incorporating naturally the necessary stabilization terms via a finite increment ... -
A suitable criterion for tube sizing in reverse cycle machines
(Universitat Politècnica de Catalunya / Université de Lorraine, 2011)
Projecte/Treball Final de Carrera
Accés obertTo find the optimal diameters for the connecting tubes in reverse cycle machines we use in this paper a new criterion that we have recently developed, the Ecological Cost, “EC" (Kheiri et al. 2011) EC includes the environmental ... -
A superconvergent HDG method for stokes flow with strongly enforced symmetry of the stress tensor
(2018-12)
Article
Accés obertThis work proposes a superconvergent hybridizable discontinuous Galerkin (HDG) method for the approximation of the Cauchy formulation of the Stokes equation using same degree of polynomials for the primal and mixed variables. ... -
Active flow control for external aerodynamics: from micro air vehicles to a full aircraft in stall
(Institute of Physics (IOP), 2020-04-01)
Article
Accés obertWe investigate the aerodynamic performance of active flow control of airfoils and wings using synthetic jets with zero net-mass flow. The study is conducted via wall-resolved and wall-modeled large-eddy simulation using ... -
Active flow control of an aircraft in full stall
(2021)
Text en actes de congrés
Accés obertThe aerodynamic performance of active flow control on wings using synthetic jets with zero net-mass flow is investigated. The study is conducted via wall-modeled large-eddy simulations using a finiteelement-based solver. ... -
Active flow control on laminar flow over a backward facing step
(Institute of Physics (IOP), 2015-09-21)
Article
Accés obertIn the present study, two dimensional flow over a backward-facing step in laminar flow regime with application of active flow control (AFC) technique is analysed. The aim of the present work is to gauge the effectiveness ... -
Active flow control optimisation on SD7003 airfoil at pre and post-stall angles of attack using synthetic jets
(2021-06-10)
Article
Accés obertThe use of Active Flow Control (AFC) technologies to modify the forces acting on streamlined bodies is one of the most active research fields in aerodynamics. For each particular application, finding the optimum set of AFC ... -
Advanced study for the numerical resolution of the navier-stokes equations using the fractional step method
(Universitat Politècnica de Catalunya, 2022-10-21)
Projecte Final de Màster Oficial
Accés obertDifferent 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. Particular case: thermal comfort
(Universitat Politècnica de Catalunya, 2021-02-12)
Projecte Final de Màster Oficial
Accés obertThis 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, ...