Exploració per tema "Turbulència -- Models matemàtics"
Ara es mostren els items 26-39 de 39
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On the symmetry-preserving regularization model on complex flows using unstructured grids
(2010)
Text en actes de congrés
Accés obertTraditionally turbulence modeling of industrial flows in complex geometries have been solved using RANS models and unstructured meshes based solvers. The lack of precision of RANS models in these situations and the increase ... -
Segregated Runge–Kutta time integration of convection-stabilized mixed finite element schemes for wall-unresolved LES of incompressible flows
(2017-01)
Article
Accés obertIn this work, we develop a high-performance numerical framework for the large eddy simulation (LES) of incompressible flows. The spatial discretization of the nonlinear system is carried out using mixed finite element (FE) ... -
Simulation numérique et modélisation de l'interaction fluide-structure et étude vibratoire de deux cylindres en tandem à nombre de Reynolds élevé
(Universitat Politècnica de Catalunya, 2013-09)
Treball Final de Grau
Accés obertDans le contexte des interactions fluide-structure, ce stage a consisté en l'analyse physique d'un écoulement instationnaire autour d'une configuration de deux cylindres en tandem à nombre de Reynolds élevé, au moyen de ... -
SOD2D: A GPU-enabled spectral finite elements method for compressible scale-resolving simulations
(2024-04)
Article
Accés obertAs new supercomputer architectures become more heavily focused on using hardware accelerators, in particular general-purpose graphical processors, it is therefore relevant that algorithms for computational fluid dynamics, ... -
Study of the effect of viscosity in drop breakup in turbulent flow
(Universitat Politècnica de Catalunya, 2021-07-12)
Treball Final de Grau
Accés obert
Realitzat a/amb: Universität BremenThe systems formed by two immiscible liquids such as emulsions are of great interest in industrial processes, the emulsion formation process occurs depending on the phenomenon of the breakup of the drops of one of the ... -
Temperature gradient effects on a turbulent channel flow at Ret=400
(Begell House, 2023)
Text en actes de congrés
Accés restringit per política de l'editorialA direct numerical simulation (DNS) of an asymmetrically heated turbulent channel flow has been performed to study the temperature gradient effects on the turbulence. The case has been set as a compressible flow with ... -
Towards a machine learning model for explicit algebraic Reynolds stress modelling using multi-expression programming
(European Research Community on Flow, Turbulence, and Conbustion (ERCOFTAC), 2023)
Text en actes de congrés
Accés obertA novel framework for a 5-term explicit algebraic Reynolds stress model has been proposed, which is suitable for machine learning procedures. Under this framework, high-fidelity datasets have been explored and post-processed. ... -
Turbulence behind 3D multi-scale sparse grids
(Institute of Physics (IOP), 2018)
Text en actes de congrés
Accés obertA fundamentally new idea in grid generated turbulence is the 3D Sparse Grid (3DS) concept [N. A. Malik. Sparse 3D Multi-Scale Grid Turbulence Generator. US Patent No. US 9,599,269 B2 (2017)] which reduces the effective ... -
Turbulence modelling and numerical issues: from RANS to DNS and LES
(2009)
Comunicació de congrés
Accés restringit per política de l'editorialThe objective of this work is to show possibilities and limitations of different turbulence models from RANS to DNS and LES. Firstly, standard approaches based on time averaging the governing equations (the so called ... -
Turbulence transition in pulsating pipe flow: shear-thinning effects
(Universitat Politècnica de Catalunya, 2021-07-12)
Treball Final de Grau
Accés obert
Realitzat a/amb: Universität BremenIn the last years the major cause of death worldwide has turned out to be because of cardiovascular diseases; for instance, owing to the presence of blood turbulence in our vessels. The problem has already been addressed ... -
Turbulent boundary layer in a 3-element high-lift wing: coherent structures identification
(Springer, 2023)
Capítol de llibre
Accés restringit per política de l'editorialA large eddy simulation (LES) of the flow past a 30P30N high-lift three-element wing is performed at the angle of attack AoA = 9º and a Reynolds number of Re = 750,000, based on the nested chord. Results are validated ... -
Turbulent separated shear flow control by surface plasma actuator: experimental optimization by genetic algorithm approach
(2016-02)
Article
Accés obertThe potential benefits of active flow control are no more debated. Among many others applications, flow control provides an effective mean for manipulating turbulent separated flows. Here, a nonthermal surface plasma ... -
Turbulent statistics and coherent structures in an asymmetrically heated channel flow
(2023)
Text en actes de congrés
Accés obertA compressible direct numerical simulation (DNS) has been conducted to analyze the behavior of a fully developed turbulent channel flow. The problem has been set at mean friction Reynolds number Ret m = 400 submitted to a ... -
Variational multiscale approximation of the one-dimensional forced Burgers equation: the role of orthogonal subgrid scales in turbulence modeling
(2018-02)
Article
Accés obertA numerical approximation for the one-dimensional Burgers equation is proposed by means of the orthogonal subgrid scales–variational multiscale (OSGS-VMS) method. We evaluate the role of the variational subscales in ...
