Exploració per tema "Àrees temàtiques de la UPC::Física::Física de fluids"
Ara es mostren els items 1-20 de 323
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3D CFD analysis of generation of bubbles in a double T-junction mini-channel
(Universitat Politècnica de Catalunya, 2018-07-18)
Treball Final de Grau
Accés obert
Realitzat a/amb: Guo li Taiwan ke ji da xueThe subject of two or multi-phase flows has become increasingly powerful and important in a wide variety of engineering systems. The aim of our project is to study the bubble generation of the water-air combination in a ... -
A characteristic length scale for density gradients in supercritical monocomponent flows near pseudoboiling
(2020-12)
Report de recerca
Accés obert -
A compressible Lagrangian framework for the simulation of underwater implosion problems
(Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2013)
Llibre
Accés obertThe development of efficient algorithms to understand implosion dynamics presents a number of challenges. The foremost challenge is to efficiently represent the coupled compressible fluid dynamics of internal air and ... -
A computational fluid dynamics study on hemodynamics for different locations of the distal anastomosis of a bypass nearby a collateral vessel in the femoropopliteal area
(John Wiley & Sons, Ltd, 2014-06-24)
Article
Accés restringit per política de l'editorialRevascularization of the femoropopliteal sector is often performed by the placement of a bypass. In this paper, we have studied the effects of hemodynamics on patency of the bypass for different positions of the distal ... -
A data-driven wall-shear stress model for LES using gradient boosted decision trees
(Springer Nature, 2021)
Text en actes de congrés
Accés obertWith the recent advances in machine learning, data-driven strategies could augment wall modeling in large eddy simulation (LES). In this work, a wall model based on gradient boosted decision trees is presented. The model ... -
A FIC-based stabilized mixed finite element method with equal order interpolation for solid–pore fluid interaction problems
(2017-01)
Article
Accés obertA new mixed displacement-pressure element for solving solid–pore fluid interaction problems is presented. In the resulting coupled system of equations, the balance of momentum equation remains unaltered, while the mass ... -
A finite point method for compressible flow
(John Wiley & sons, 2002-03)
Article
Accés obertA weighted least squares finite point method for compressible flow is formulated. Starting from a global cloud of points, local clouds are constructed using a Delaunay technique with a series of tests for the quality of ... -
A fractional step method for computational aeroacoustics using weak imposition of Dirichlet boundary conditions
(Elsevier, 2020-01)
Article
Accés obertIn 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 framework for estimating epistemic uncertainty in LES closures
(2016)
Report de recerca
Accés obert -
A mechanism for streamwise localisation of nonlinear waves in shear flows
(2015-09-01)
Article
Accés obertWe present the complete unfolding of streamwise localisation in a paradigm of extended shear flows, namely two-dimensional plane Poiseuille flow. Exact solutions of the Navier-Stokes equations are computed numerically and ... -
A memory-efficient MultiVector Quasi-Newton method for black-box Fluid-Structure Interaction coupling
(2023-01)
Article
Accés obertIn this work we present a novel Quasi-Newton technique for the black-box partitioned coupling of interface coupled problems. The new RandomiZed Multi-Vector Quasi-Newton method stems from the combination of the original ... -
A method for incorporating chemical reactions into CODE_BRIGHT
(Universitat Politècnica de Catalunya. Departament d'Enginyeria del Terreny, Cartogràfica i Geofísica (ETCG), 2012)
Text en actes de congrés
Accés restringit per política de l'editorial -
A mixed three-field FE formulation for stress accurate analysis including the incompressible limit
(2015-01)
Article
Accés obertIn previous works, the authors have presented the stabilized mixed displacement/pressure formulation to deal with the incompressibility constraint. More recently, the authors have derived stable mixed stress/displacement ... -
A modified Finite Element formulation for the imposition of the slip boundary condition over embedded volumeless geometries
(2019-08)
Article
Accés obertThis work describes a novel formulation for the simulation of Navier–Stokes problems including embedded objects. The new proposal is based on the use of a modified finite element space, which replaces the standard one ... -
A modified fractional step approach
(2011)
Text en actes de congrés
Accés obertWe propose here a methodology for improving mass-conservation features of the fractional-step schemes on moving grids applied to viscous incompressible flows containing free surfaces. The idea is to find a better approximation ... -
A modified fractional step method for fluid–structure interaction problems
(2017-01)
Article
Accés obertWe propose a Lagrangian fluid formulation particularly suitable for fluid–structure interaction (FSI) simulation involving free-surface flows and light-weight structures. The technique combines the features of fractional ... -
A new open source solver for modelling fluid-structure interaction: case study of a point-absorberwave energy converter with power take-off unit
(National Technical University of Athens, 2020)
Text en actes de congrés
Accés obertIn this work, the capabilities of the open source code DualSPHysics coupled with the multiphysics library Project Chrono are shown. The framework is validated through an experimental campaign performed on a wave energy ... -
A new subgrid characteristic length for turbulence simulations on anisotropic grids
(2017-11-29)
Article
Accés obertDirect numerical simulations of the incompressible Navier-Stokes equations are not feasible yet for most practical turbulent flows. Therefore, dynamically less complex mathematical formulations are necessary for coarse-grained ... -
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 ...