Browsing by Subject "Dinàmica de fluids -- Mètodes numèrics"
Now showing items 1-20 of 35
-
A fractional step method for computational aeroacoustics using weak imposition of Dirichlet boundary conditions
(Elsevier, 2020-01)
Article
Open AccessIn this work we consider the approximation of the isentropic Navier–Stokes equations. The model we present is capable of taking into account acoustic and flow scales at once. After space and time discretizations have been ... -
A Lagrangian nodal integration method for free-surface fluid flows
(2020-04)
Article
Open AccessWe present a Lagrangian nodal integration method for the simulation of Newtonian and non-Newtonian free-surface fluid flows. The proposed nodal Lagrangian method uses a finite element mesh to discretize the computational ... -
A numerical strategy to compute optical parameters in turbulent flow: application to telescopes
(2008-07-29)
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 particle finite element method (PFEM) for coupled thermal analysis of quasi and fully incompressible flows and fluid-structure interaction problems
(Springer, 2014)
Part of book or chapter of book
Restricted access - publisher's policyThis book presents and discusses mathematical models, numerical methods and computational techniques used for solving coupled problems in science and engineering. It takes a step forward in the formulation and solution of ... -
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 ... -
An advanced finite element method for fluid dynamic analysis of America's Cup boats
(Massey University, 2002)
Conference report
Restricted access - publisher's policyThis paper shows a step forward in the development of a stabilized method for solving the Reynolds equations (RANSE) including free surface effects. The starting point of this method is the modified governing differential ... -
An enriched finite element/level-set method for simulating two-phase incompressible fluid flows with surface tension
(2020-10)
Article
Open AccessA finite element method is introduced to simulate surface tension dominated flow of two immiscible fluids featuring an enriched space for capturing both strong and weak pressure discontinuities. The proposed enriched finite ... -
Applications of turbulence modeling in civil engineering
(International Centre for Numerical Methods in Engineering (CIMNE), 2016)
Book
Open AccessThis work explores the use of stabilized finite element formulations for the incompressible Navier-Stokes equations to simulate turbulent flow problems. Turbulence is a challenging problem due to its complex and dynamic ... -
Computational study of the smoke propagation in a library
(Universitat Politècnica de Catalunya, 2008-06)
Master thesis
Restricted access - author's decisionA firе еmеrgеncy in a univеrsity (Е.T.S.Е.I.B., UPC) library has bееn numеrically studiеd using CFD simulation (Firе Dynamics Simulator) for indoor propagation of hazardous smokе. Thе 3D-CFD simulation was pеrformеd using ... -
DNS of falling droplets in a vertical channel
(WIT Press, 2018-02-01)
Article
Open AccessThis paper presents Direct Numerical Simulation (DNS) of the falling motion of single and multiple deformable drops in a vertical channel. A systematic study of the wall effect on the motion of single drop is performed for ... -
Elementos fluidos en 2D y 3D para análisis dinámico con interacción fluido-estructura
(1988)
Article
Open AccessSe presenta un elemeto finito, formulado en desplazamientos, para análisis de interacción fluído-estructura, incluso en el caso de fluído con superficie libre. Dicha formulación requiere, para su buen comportamiento, el ... -
Error estimation in vibroacoustic problems solved by means of finite elements
(2010-06)
Conference report
Open AccessThe vibroacoustic equations can be solved by means of the finite element method. A discretisation of the structure and the acoustic domains is required and highly influences the quality of the numerical solution. There ... -
FIC/FEM formulation with matrix stabilizing terms for incompressible flows at low and high Reynolds numbers
(2006-09)
Article
Open AccessWe present a general formulation for incompressible fluid flow analysis using the finite element method. The necessary stabilization for dealing with convective effects and the incompressibility condition are introduced ... -
Fluid dynamic analysis of America's cup boats including dynamic sinkage and trim effects
(2003)
Conference report
Open AccessThis paper shows a step forward in the development of a stabilized method for solving the Reynolds equations (RANSE) including free surface effects. The starting point of this method is the modified governing differential ... -
High-order accurate time-stepping schemes for convection-diffusion problems
(2000-02)
Article
Open AccessThe paper discusses the formulation of high-order accurate time-stepping schemes for transient convection–diffusion problems to be combined with finite element methods of the least-squares type for a stable discretization ... -
Lock-in and drag amplification effects in slender line-like structures through CFD
(2012-05)
Article
Restricted access - publisher's policyLock-in and drag amplification phenomena are studied for a flexible cantilever using a simplified fluid-structure interaction approach. Instead of solving the 3D domain, a simplified setup is devised, in which 2D flow ... -
Método de reducción al contorno para la dinámica de un fluido con superficie libre
(1989)
Article
Open AccessLa descripción usual del movimiento de un fluido incompresible en régimen potencial, bajo la acción de la gravedad, con su superficie superior libre, viene dada por la ecuación de Laplace -lineal y sin derivadas respecto ... -
Numerical algorithms for three dimensional computational fluid dynamic problems
(Universitat Politècnica de Catalunya, 2001-12-20)
Doctoral thesis
Open AccessThe target of this work is to contribute to the enhancement of numerical methods for the simulation of complex thermal systems. Frequently, the factor that limits the accuracy of the simulations is the computing power: ... -
Numerical Model of Capillary Tubes: Enhanced Performance and Study of Non-Adiabatic Effects
(Purdue University, 2014)
Conference report
Restricted access - publisher's policyIn the present work a numerical model to simulate the thermal and fluid-dynamic phenomena inside non-adiabatic capillary tubes is presented. It consists of an improved version of the distributed model detailed in Ablanque ...
