Exploració per autor "Gorobets, Andrei"
Ara es mostren els items 14-33 de 80
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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)
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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. -
DNS and LES on unstructured grids: playing with matrices to preserve symmetries using a minimal set of algebraic kernels
Trias Miquel, Francesc Xavier; Álvarez Farré, Xavier; Alsalti Baldellou, Àdel; Gorobets, Andrei; Oliva Llena, Asensio (Scipedia, 2022)
Text en actes de congrés
Accés obertThe essence of turbulence are the smallest scales of motion. They result from asubtle balance between two differential operators differing in symmetry: The convective operator is skew-symmetric, whereas the diffusive is ... -
DNS and regularization modeling of a turbulent differentially heated cavity of aspect ratio 5
Trias Miquel, Francesc Xavier; Gorobets, Andrei; Oliva Llena, Asensio; Pérez Segarra, Carlos David (2013-01-15)
Article
Accés obertThis work is devoted to the study of turbulent natural convection flows in differentially heated cavities. The adopted configuration corresponds to an airfilled (Pr = 0.7) cavity of aspect ratio 5 and Rayleigh number Ra ... -
DNS of turbulent natural convection flows on the MareNostrum supercomputer
Trias Miquel, Francesc Xavier; Gorobets, Andrei; Soria Guerrero, Manel; Oliva Llena, Asensio (2009)
Article
Accés restringit per política de l'editorialA code for the direct numerical simulation (DNS) of incompressible turbulent flows that provides a fairly good scalability for a wide range of computer architectures has been developed. The spatial discretization of the ... -
DNS/LES using a minimal set of algebraic Kernels: challenges and opportunities
Trias Miquel, Francesc Xavier; Álvarez Farré, Xavier; Alsalti Baldellou, Àdel; Gorobets, Andrei; Oliva Llena, Asensio (Parallel Computational Fluid Dynamics (ParCFD), 2022)
Text en actes de congrés
Accés restringit per política de l'editorialIn the last decades, CFD has become a standard design tool in many fields such as automotive, aeronautical and wind power industries. The driven force behind this is the development of numerical techniques in conjunction ... -
Effect of collisions on the particle behavior in a turbulent square duct flow
Zhang, Hao; Trias Miquel, Francesc Xavier; Gorobets, Andrei; Oliva Llena, Asensio; Yang, Dongmin; Tan, Yuanqiang; Sheng, Yong (2015-01-01)
Article
Accés restringit per política de l'editorialThe effect of collisions on the particle behavior in a fully developed turbulent flow in a straight square duct at Re-r = 300 is numerically investigated. The hydrodynamic modeling of the fluid phase is based on direct ... -
Efficiency of large-scale CFD simulations on modern supercomputers using thousands of CPUS and hybrid MPI+OPENMP parallelization
Gorobets, Andrei; Borrell Pol, Ricard; Trias Miquel, Francesc Xavier; Kozubskaya, T.K.; Oliva Llena, Asensio (2010)
Comunicació de congrés
Accés restringit per política de l'editorialThis work represents an experience in using the hybrid parallel model to perform large-scale DNS. Advantages of the hybrid approach compared to the MPI-only approach are presented and discussed. The use of OpenMP in addition ... -
Efficient CFD code implementation for the ARM-based Mont-Blanc architecture
Oyarzun Altamirano, Guillermo; Borrell Pol, Ricard; Gorobets, Andrei; Mantovani, Filippo; Oliva Llena, Asensio (Elsevier, 2017-09-20)
Article
Accés obertSince 2011, the European project Mont-Blanc has been focused on enabling ARM-based technology for HPC, developing both hardware platforms and system software. The latest Mont-Blanc prototypes use system-on-chip (SoC) devices ... -
Efficient CFD code implementation for the ARM-based Mont-Blanc architecture
Oyarzun Altamirano, Guillermo; Borrell Pol, Ricard; Gorobets, Andrei; Mantovani, Filippo; Oliva Llena, Asensio (Elsevier, 2018-02)
Article
Accés obertSince 2011, the European project Mont-Blanc has been focused on enabling ARM-based technology for HPC, developing both hardware platforms and system software. The latest Mont-Blanc prototypes use system-on-chip (SoC) devices ... -
Efficient strategies for solving the variable Poisson equation with large contrasts in the coefficients
Alsalti Baldellou, Àdel; Álvarez Farré, Xavier; Gorobets, Andrei; Trias Miquel, Francesc Xavier; Oliva Llena, Asensio (2022)
Text en actes de congrés
Accés obertDiscrete versions of Poisson’s equation with large contrasts in the coefficients result in very ill-conditioned systems. Thus, its iterative solution represents a major challenge, for instance, in porous media and multiphase ... -
Evaluation of enhanced gray area mitigation approaches based on jet aeroacoustics
Duben, Alexey; Ruano Pérez, Jesús; Gorobets, Andrei; Rigola Serrano, Joaquim; Trias Miquel, Francesc Xavier (2023-02)
Article
Accés obertAn investigation of various eddy viscosity models for accurate scale-resolving simulation of aerodynamics and aeroacoustics of a turbulent jet is presented. The models are considered from the perspective of solving the ... -
Fine-scale dynamics in turbulent Rayleigh-Bénard convection
Dabbagh, Firas; Trias Miquel, Francesc Xavier; Gorobets, Andrei; Oliva Llena, Asensio (Begell House, 2015)
Text en actes de congrés
Accés restringit per política de l'editorialSmall-scale universal features captured normally in many turbulent flows have been reviewed in Rayleigh-Bénard convection. Namely, dynamical Lagrangian representations of the velocity gradient tensor invariants have displayed ... -
Flow topology dynamics in a three-dimensional phase space for turbulent Rayleigh-Bénard convection
Dabbagh, Firas; Trias Miquel, Francesc Xavier; Gorobets, Andrei; Oliva Llena, Asensio (2020-02-28)
Article
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From extruded-2D to fully-3D geometries for DNS: a multigrid-based extension of the Poisson solver
Gorobets, Andrei; Trias Miquel, Francesc Xavier; Soria Guerrero, Manel; Pérez Segarra, Carlos David; Oliva Llena, Asensio (2010)
Article
Accés restringit per política de l'editorialDirect numerical simulation (DNS) of incompressible flows is an essential tool for improving the understanding of the physics of turbulence and for the development of better turbulence models. The Poisson equation, the ...