Exploració per autor "Borrell Pol, Ricard"
Ara es mostren els items 38-57 de 61
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Large-eddy simulation of turbulent dynamic fluid-structure interaction
Estruch Pérez, Olga; Lehmkuhl Barba, Oriol; Borrell Pol, Ricard; Pérez Segarra, Carlos David (Begell House, 2012)
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LES-based study of the roughness effects on the wake of a circular cylinder from subcritical to transcritical Reynolds numbers
Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Piomelli, Ugo; Chiva Segura, Jorge; Borrell Pol, Ricard; Oliva Llena, Asensio (2017-10-27)
Article
Accés obertThis paper investigates the effects of surface roughness on the flow past a circular cylinder at subcritical to transcritical Reynolds numbers. Large eddy simulations of the flow for sand grain roughness of size k/D = 0.02 ... -
Low-frequency unsteadiness in the vortex formation region of a circular cylinder
Lehmkuhl Barba, Oriol; Rodríguez Pérez, Ivette María; Borrell Pol, Ricard; Oliva Llena, Asensio (2013-08-23)
Article
Accés obertThe presence of low-frequency fluctuations in the wake of bluff bodies have been observed in several investigations. Even though the flow past a circular cylinder at Re = 3900 (Re = U ref D/ν) has been the object of several ... -
Low-frequency variations in the wake of a circular cylinder at Re = 3900
Lehmkuhl Barba, Oriol; Rodríguez Pérez, Ivette María; Borrell Pol, Ricard; Pérez Segarra, Carlos David; Oliva Llena, Asensio (2011)
Comunicació de congrés
Accés obertFlow around cylindrical structures is of relevance for many practical applications. Knowledge of flow-related unsteady loading of such structures is crucial for hydro- and aerodynamic control and design. In order to obtain ... -
Memory aware poisson solver for peta-scale simulations with one FFT diagonalizable direction
Oyarzun Altamirano, Guillermo; Borrell Pol, Ricard; Trias Miquel, Francesc Xavier; Oliva Llena, Asensio (Institute of Electrical and Electronics Engineers (IEEE), 2017)
Text en actes de congrés
Accés obertProblems with some sort of divergence constraint are found in many disciplines: computational fluid dynamics, linear elasticity and electrostatics are examples thereof. Such a constraint leads to a Poisson equation which ... -
On DNS and LES of natural convection of wall-confined flows: Rayleigh-Bénard convection
Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Borrell Pol, Ricard; Pérez Segarra, Carlos David (Springer, 2010)
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On the fast transient spoiler deployment in a NACA0012 profile using LES techniques combined with AMR and IMB methods
Favre Samarra, Federico; Antepara Zambrano, Óscar; Lehmkuhl Barba, Oriol; Borrell Pol, Ricard; Oliva Llena, Asensio (2014)
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On the flow past a circular cylinder from critical to super-critical Reynolds numbers: Wake topology and vortex shedding
Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Chiva Segura, Jorge; Borrell Pol, Ricard; Oliva Llena, Asensio (2015-05-13)
Article
Accés obertLarge-eddy simulations (LES) of the flow past a circular cylinder are used to investigate the flow topology and the vortex shedding process at Reynolds numbers Re=2.5×105-8.5×105Re=2.5×105-8.5×105. This range encompasses ... -
On the large-eddy simulations of the flow past a cylinder at critical Reynolds numbers
Lehmkuhl Barba, Oriol; Rodríguez Pérez, Ivette María; Chiva Segura, Jorge; Borrell Pol, Ricard (Springer, 2013)
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On the symmetry-preserving regularization model on complex flows using unstructured grids
Lehmkuhl Barba, Oriol; Borrell Pol, Ricard; Rodríguez Pérez, Ivette María; Pérez Segarra, Carlos David; Oliva Llena, Asensio (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 ... -
On the wake transition in the flow past a circular cylinder at critical Reynolds numbers
Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Chiva Segura, Jorge; Borrell Pol, Ricard; Oliva Llena, Asensio (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2014)
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Optimising the Termofluids CFD code for petascale simulations
Borrell Pol, Ricard; Chiva Segura, Jorge; Lehmkuhl Barba, Oriol; Oyarzun Altamirano, Guillermo; Rodríguez Pérez, Ivette María; Oliva Llena, Asensio (2016)
Article
Accés obertThis paper presents some recent efforts carried out on the expansion of the scalability of TermoFluids multi-physics Computational Fluid Dynamics (CFD) code, aiming to achieve petascale capacity for a single simulation. ... -
Parallel adaptive mesh refinement for large-eddy simulations of turbulent flows
Antepara Zambrano, Óscar; Lehmkuhl Barba, Oriol; Borrell Pol, Ricard; Chiva Segura, Jorge; Oliva Llena, Asensio (Elsevier, 2015-03-30)
Article
Accés obertIn this paper a parallel adaptive mesh refinement (AMR) strategy for large eddy simulations (LES) of turbulent flows is presented. The underlying discretization of the Navier-Stokes equations is based on a finite-volume ... -
Parallel algorithm for the solution of the Boltzmann transport equation on unstructured meshes
Colomer Rey, Guillem; Borrell Pol, Ricard; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David (2011)
Comunicació de congrés
Accés obertThe Boltzmann transport equation is solved by means of a parallel explicit algorithm known as parallel sweep, and a source iteration procedure to solve the coupling between different angular directions. Using an explicit ... -
Parallel algorithms for computational fluid dynamics on unstructured meshes
Borrell Pol, Ricard (Universitat Politècnica de Catalunya, 2012-10-31)
Tesi
Accés obertLa simulació numèrica directa (DNS) de fluxos complexes és actualment una utopia per la majoria d'aplicacions industrials ja que els requeriments computacionals son massa elevats. Donat un flux, la diferència entre els ... -
Parallel algorithms for Sn transport sweeps on unstructured meshes
Colomer, Guillem; Borrell Pol, Ricard; Trias Miquel, Francesc Xavier; Rodríguez Pérez, Ivette María (2013-01-01)
Article
Accés restringit per política de l'editorialThe Boltzmann Transport Equation is solved on unstructured meshes using the Discrete Ordinates Method. The flux for each ordinate is swept across the computational grid, within a source iteration loop that accounts for ... -
Parallel load balancing strategy for Volume-of-Fluid methods on 3-D unstructured meshes
Jofre Cruanyes, Lluís; Borrell Pol, Ricard; Lehmkuhl Barba, Oriol; Oliva Llena, Asensio (2015-02-01)
Article
Accés obertl Volume-of-Fluid (VOF) is one of the methods of choice to reproduce the interface motion in the simulation of multi-fluid flows. One of its main strengths is its accuracy in capturing sharp interface geometries, although ... -
Parallel mesh multiplication and adaptation technique for turbulent flow simulation using unstructured meshes
Antepara Zambrano, Óscar; Lehmkuhl Barba, Oriol; Borrell Pol, Ricard; Oliet Casasayas, Carles; Oliva Llena, Asensio (2015)
Text en actes de congrés
Accés restringit per política de l'editorialIn this paper, we report the development of a parallel mesh multiplication code to subdivide a base mesh (containing tetrahedral, pyramids, prisms or hexahedral) into a finer mesh without user intervention, taking care of ... -
Parallel Poisson solver for revolved unstructured grids. DNS of the flow around a sphere at Re = 3700.
Borrell Pol, Ricard; Lehmkuhl Barba, Oriol; Rodríguez Pérez, Ivette María; Pérez Segarra, Carlos David; Oliva Llena, Asensio (2009)
Comunicació de congrés
Accés restringit per política de l'editorialIn this paper a parallel direct Poisson solver for DNS simulation of turbulent flows in domains of revolution using unstructured meshes is presented. It is based on a Fourier diagonalization in the azimuthal direction and ... -
Parallel SFC-based mesh partitioning and load balancing
Borrell Pol, Ricard; Oyarzun Altamirano, Guillermo; Dosimont, Damien; Houzeaux, Guillaume (Institute of Electrical and Electronics Engineers (IEEE), 2019)
Comunicació de congrés
Accés obertModern supercomputers allow the simulation of complex phenomena with increased accuracy. Eventually, this requires finer geometric discretizations with larger numbers of mesh elements. In this context, and extrapolating ...