Exploració per autor "Trias Miquel, Francesc Xavier"
Ara es mostren els items 38-57 de 150
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Data-driven prediction of flow parameters in a ventilated cavity using high-fidelity CFD simulations
Morozova, Nina; Trias Miquel, Francesc Xavier; Capdevila Paramio, Roser; Oliva Llena, Asensio (International Building Performance Simulation Association (IBPSA), 2021)
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Accés restringit per política de l'editorialIn this study, we develop a machine-learning-based data-driven model, which predicts comfort-related flow parameters in a ventilated room. The model is based on the results of high-fidelity computational fluid dynamics ... -
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)
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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 and large eddy simulations of non-Oberbeck-Boussinesq effects in a turbulent tall water-filled differentially heated cavity
Kizildag, Deniz; Rodríguez Pérez, Ivette María; Trias Miquel, Francesc Xavier; Oliva Llena, Asensio (2015)
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Accés restringit per política de l'editorialThe present work first submits to investigation the non-Oberbeck-Boussinesq (NOB) effects in a tall water-filled differentially heated cavity by means of direct numerical simulations. The results reveal that if NOB effects ... -
Direct and large-eddy simulation of non-oberbeck-boussinesq effects in a turbulent differentially heated cavity
Kizildag, Deniz; Trias Miquel, Francesc Xavier; Rodríguez Pérez, Ivette María; Oliva Llena, Asensio (Springer, 2013)
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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 ... -
Disseny d'un taxi urbà elèctric
Ramells i Rubio, Josep; Trias Miquel, Francesc Xavier (Universitat Politècnica de Catalunya, 2000-10)
Projecte/Treball Final de Carrera
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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)
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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)
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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 a Backward-Facing Step at high Reynolds number. Towards a better understanding of RANS-LES transition in DES models
Pont Vilchez, Arnau; Trias Miquel, Francesc Xavier; Oliva Llena, Asensio (2018)
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Accés restringit per política de l'editorialA DNS of an incompressible fluid flow over a Backward Facing Step (BFS ) with an Expansion Ratio (ER ) equal to 2, ER = H/(H - h), has been performed. Where h and H represent the step and the outlet heights, respectively. ... -
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)
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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 ... -
Effect of hydrogen addition to methane-air jet flame based on Sandia flame D
Liu, Jinglong; Pérez Segarra, Carlos David; Rigola Serrano, Joaquim; Trias Miquel, Francesc Xavier (Scipedia, 2022)
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Accés obertThe present study investigates the effect of hydrogen addition to methane-air jet flame based on Sandia flame D. For this purpose, RANS simulations with a global four-step mechanism were first compared with other reduced ... -
Effect of mesh partition on the scalability of the parallel solution of the radiative transfer equation
Colomer Rey, Guillem; Borrell Pol, Ricard; Trias Miquel, Francesc Xavier; Oliva Llena, Asensio (2011)
Comunicació de congrés
Accés restringit per política de l'editorialThe radiative transfer equation is solved in parallel using spatial domain decomposition. The effect of several kinds of mesh partitioning strategies is analyzed in this work. Geometries discretized with both structured ... -
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 ...