Exploració per autor "Gorobets, Andrei"
Ara es mostren els items 1-20 de 80
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A hierarchical parallel implementation for heterogeneous computing. Application to algebra-based CFD simulations on hybrid supercomputers
Álvarez Farré, Xavier; Gorobets, Andrei; Trias Miquel, Francesc Xavier (Elsevier, 2021-01)
Article
Accés obertThe quest for new portable implementations of simulation algorithms is motivated by the increasing variety of computing architectures. Moreover, the hybridization of high-performance computing systems imposes additional ... -
A new subgrid characteristic length for turbulence simulations on anisotropic grids
Trias Miquel, Francesc Xavier; Gorobets, Andrei; Silvis, Maurits; Verstappen, Roel W.C.P.; Oliva Llena, Asensio (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 priori study of subgrid-scale features in turbulent Rayleigh-Bénard convection
Dabbagh, Firas; Trias Miquel, Francesc Xavier; Gorobets, Andrei; Oliva Llena, Asensio (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 pure virtual approach for managing platform portability on hybrid supercomputers
Álvarez Farré, Xavier; Gorobets, Andrei; Alsalti Baldellou, Àdel; Trias Miquel, Francesc Xavier (2019)
Text en actes de congrés
Accés restringit per política de l'editorialCommonly, the development of scientific computing software follows a stencilbased approach: the numerical methods and algorithms are introduced into computing systems through stencil data structures and sweeps (i.e. ... -
A simple approach to discretize the viscous term with spatially varying (eddy-)viscosity
Trias Miquel, Francesc Xavier; Gorobets, Andrei; Oliva Llena, Asensio (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 ... -
An OpenCL-based parallel CFD code for simulations on hybrid systems with massively-parallel accelerators
Gorobets, Andrei; Trias Miquel, Francesc Xavier; Oliva Llena, Asensio (Elsevier, 2013)
Text en actes de congrés
Accés obertA parallel finite-volume CFD algorithm for modeling of incompressible flows on hybrid supercomputers is presented. It is based on a symmetry-preserving high-order numerical scheme for structured meshes. A multilevel ... -
Assessment of grey-area mitigation techniques and their effects on jet aerodynamics and aeroacoustics
Ruano Pérez, Jesús; Duben, Alexey; Gorobets, Andrei; Trias Miquel, Francesc Xavier (Begell House, 2023)
Text en actes de congrés
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Blending regularization and large-eddy simulation. From homogeneous isotropic turbulence to wind farm boundary layers
Folch Flórez, David; Trias Miquel, Francesc Xavier; Gorobets, Andrei; Oliva Llena, Asensio (2013)
Comunicació de congrés
Accés restringit per política de l'editorialThe incompressible Navier-Stokes equations form an excellent mathematical model for turbulent flows. However, direct simulations at high Reynolds numbers are not feasible because the convective term produces far too many ... -
Building a new subgrid characteristic length for LES
Trias Miquel, Francesc Xavier; Gorobets, Andrei; Duben, Alexey; Oliva Llena, Asensio (Keldysh Institute of Applied Mathematics, 2016)
Text en actes de congrés
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Building a proper tensor-diffusivity model for large-eddy simulation of buoyancy-driven flows
Trias Miquel, Francesc Xavier; Dabbagh, Firas; Gorobets, Andrei; Oliva Llena, Asensio (International Centre for Numerical Methods in Engineering (CIMNE), 2018)
Text en actes de congrés
Accés restringit per política de l'editorialIn this work, we plan to shed light on the following research question: can we ¿nd a nonlinear tensorial subgrid-scale (SGS) heat ¿ux model with good physical and numerical properties, such that we can obtain satisfactory ... -
Building proper invariants for eddy-viscosity subgrid-scale models
Trias Miquel, Francesc Xavier; Folch, David; Gorobets, Andrei; Oliva Llena, Asensio (2015-06-23)
Article
Accés obertDirect simulations of the incompressible Navier-Stokes equations are limited to relatively low-Reynolds numbers. Hence, dynamically less complex mathematical formulations are necessary for coarse-grain simulations. ... -
Building proper invariants for large eddy simulation
Trias Miquel, Francesc Xavier; Folch, David; Gorobets, Andrei; Oliva Llena, Asensio (Springer, 2015)
Text en actes de congrés
Accés restringit per política de l'editorial -
Building proper invariants for subgrid-scale eddy-viscosity models
Trias Miquel, Francesc Xavier; Folch, David; Gorobets, Andrei; Oliva Llena, Asensio (2015)
Text en actes de congrés
Accés restringit per política de l'editorialSince direct simulations of the incompressible Navier-Stokes equations are limited to relatively low-Reynolds numbers, dynamically less complex mathematical formulations are necessary for coarse-grain simulations. ... -
Development of a low-level, algebra-based library to provide platform portability on hybrid supercomputers
Álvarez Farré, Xavier; Alsalti Baldellou, Àdel; Colomer Rey, Guillem; Gorobets, Andrei; Trias Miquel, Francesc Xavier; Oliva Llena, Asensio (Scipedia, 2022)
Text en actes de congrés
Accés obertContinuous enhancement in hardware technologies enables scientific computing to advance incessantly and reach further aims. Since the start of the global race for exascale high-performance computing, massively-parallel ... -
Direct numerical simulation of a differentially heated cavity of aspect ratio 4 with Rayleigh numbers up to 10(11) - Part I: Numerical methods and time-averaged flow
Trias Miquel, Francesc Xavier; Gorobets, Andrei; Soria Guerrero, Manel; Oliva Llena, Asensio (2010-01-31)
Article
Accés restringit per política de l'editorialA set of direct numerical simulations of a differentially heated cavity of aspect ratio 4 with adiabatic horizontal walls is presented. The five configurations selected here (Rayleigh numbers based on the cavity height ... -
Direct numerical simulation of a differentially heated cavity of aspect ratio 4 with Rayleigh numbers up to 10(11) - Part II: Heat transfer and flow dynamics
Trias Miquel, Francesc Xavier; Gorobets, Andrei; Soria Guerrero, Manel; Oliva Llena, Asensio (2010-01-31)
Article
Accés restringit per política de l'editorialThis is the second of a two-part paper on five direct numerical simulations of a differentially heated cavity of aspect ratio 4 with adiabatic horizontal walls (Rayleigh numbers based on the cavity height. The numerical ... -
Direct numerical simulation of a fully developed turbulent square duct flow up to Re-tau=1200
Zhang, Hao; Trias Miquel, Francesc Xavier; Gorobets, Andrei; Tan, Yuanqiang; Oliva Llena, Asensio (2015-08-01)
Article
Accés obertVarious fundamental studies based on a turbulent duct flow have gained popularity including heat transfer, magnetohydrodynamics as well as particle-laden transportation. An accurate prediction on the turbulent flow field ... -
Direct numerical simulation of backward-facing step flow at Ret = 395 and expansion ratio 2
Pont Vilchez, Arnau; Trias Miquel, Francesc Xavier; Gorobets, Andrei; Oliva Llena, Asensio (2019-03-25)
Article
Accés obertBackward-facing step (BFS) constitutes a canonical configuration to study wallbounded flows subject to massive expansions produced by abrupt changes in geometry. Recirculation flow regions are common in this type of flow, ... -
Direct numerical simulation of turbulent flows with parallel algorithms for various computing architectures
Gorobets, Andrei; Trias Miquel, Francesc Xavier; Borrell Pol, Ricard; Oyarzun Altamirano, Guillermo; Oliva Llena, Asensio (International Association for Computational Mechanics (IACM), 2014)
Text en actes de congrés
Accés restringit per política de l'editorialThe purpose of the work is twofold. Firstly, it is devoted to the development of efficient parallel algorithms for large-scale simulations of turbulent flows on different supercomputer architectures. It reports experience ... -
DNS and LES of buoyancy-driven turbulence at high Rayleigh numbers: numerical methods and SGS models
Trias Miquel, Francesc Xavier; Álvarez Farré, Xavier; Santos Serrano, Daniel; Gorobets, Andrei; Oliva Llena, Asensio (Springer, 2022)
Text en actes de congrés
Accés restringit per política de l'editorialBuoyancy-driven flows have always been an important subject of scientific studies with numerous applications in environment and technology.