Exploració per autor "Houzeaux, Guillaume"Més informació

Ara es mostren els items 47-66 de 87

    • Large-eddy simulations of the vortex-induced vibration of a low mass ratio two-degree-of-freedom circular cylinder at subcritical Reynolds numbers 

      Pastrana Maldonado, Daniel; Cajas García, Juan Carlos; Lehmkuhl Barba, Oriol; Rodríguez Pérez, Ivette María; Houzeaux, Guillaume (Elsevier, 2018-09)
      Article
      Accés obert
      The vortex induced vibration phenomenon of a low mass ratio () two-degree-of-freedom circular cylinder at subcritical Reynolds numbers ( 5300, 11,000) has been investigated by means of large-eddy simulations. A low-dissipative ...

    • Large-scale CFD simulations of the transitional and turbulent regime for the large human airways during rapid inhalation 

      Calmet, Hadrien; Gambaruto, Alberto M.; Bates, Alister J.; Vázquez, Mariano; Houzeaux, Guillaume; Doorly, Denis J. (Elsevier, 2016-02-01)
      Article
      Accés obert
      The dynamics of unsteady flow in the human large airways during a rapid inhalation were investigated using highly detailed large-scale computational fluid dynamics on a subject-specific geometry. The simulations were ...

    • Left Ventricular Trabeculations Decrease the Wall Shear Stress and Increase the Intra-Ventricular Pressure Drop in CFD Simulations 

      Sacco, Federica; Paun, Bruno; Lehmkuhl Barba, Oriol; Iles, Tinen L.; Iaizzo, Paul A.; Houzeaux, Guillaume; Vázquez, Mariano; Butakoff, Constantine; Aguado-Sierra, Jazmin (Frontiers Media, 2018-04-30)
      Article
      Accés obert
      The aim of the present study is to characterize the hemodynamics of left ventricular (LV) geometries to examine the impact of trabeculae and papillary muscles (PMs) on blood flow using high performance computing (HPC). ...

    • Local preconditioning and variational multiscale stabilization for Euler compressible steady flow 

      Moragues, Margarida; Vázquez, Mariano; Houzeaux, Guillaume (Elsevier, 2016)
      Article
      Accés obert
      This paper introduces a preconditioned variational multiscale stabilization (P-VMS) method for compressible flows. In this introductory paper we focus on inviscid flow and steady state problems. The Euler equations are ...

    • MPI+X: task-based parallelisation and dynamic load balance of finite element assembly 

      Garcia, Marta; Houzeaux, Guillaume; Ferrer, Roger; Artigues, Antoni; López, Victor; Labarta Mancho, Jesús José; Vázquez, Mariano (Taylor & Francis, 2019-05)
      Article
      Accés obert
      The main computing phases of numerical methods for solving partial differential equations are the algebraic system assembly and the iterative solver. This work focuses on the first task, in the context of a hybrid MPI+X ...

    • MPI+X: task-based parallelization and dynamic load balance of finite element assembly 

      Garcia-Gasulla, Marta; Houzeaux, Guillaume; Ferrer, Roger; Artigues, Antoni; López, Victor; Labarta Mancho, Jesús José; Vázquez, Mariano (Taylor & Francis, 2018)
      Article
      Accés obert
      The main computing tasks of a finite element code(FE) for solving partial differential equations (PDE's) are the algebraic system assembly and the iterative solver. This work focuses on the first task, in the context of ...

    • Nasal sprayed particle deposition in a human nasal cavity under different inhalation conditions 

      Calmet, Hadrien; Inthavong, Kiao; Eguzkitza, Beatriz; Lehmkuhl Barba, Oriol; Houzeaux, Guillaume (Public Library of Science, 2019-09-06)
      Article
      Accés obert
      Deposition of polydisperse particles representing nasal spray application in a human nasal cavity was performed under transient breathing profiles of sniffing, constant flow, and breath hold. The LES turbulence model was ...

    • Numbering along advection for Gauss-Seidel and bidiagonal preconditioners 

      Córdoba, Paula; Houzeaux, Guillaume (Barcelona Supercomputing Center, 2015-05-05)
      Text en actes de congrés
      Accés obert
      Domain decomposition methods (DDM) are often chosen to precondition sparse linear systems of equations, as they are famous to well-improve the convergence of iterative solvers. But at the same time, they are difficult to ...

    • Numerical characterization of a technically premixed hydrogen flame under conditions close to flashback 

      Mira Martínez, Daniel; Lehmkuhl Barba, Oriol; Both, Ambrus; Stathopoulos, Panagiotis; Tanneberger, Tom; Reichel, Thoralf G.; Paschereit, Christian Oliver; Vázquez, Mariano; Houzeaux, Guillaume (Springer, 2020-03)
      Article
      Accés obert
      This work presents a numerical study of a technically premixed swirling combustor with central air injection at conditions close to flashback using large-eddy simulation with flamelet modelling. This burner has the ...

    • Numerical methods 

      Agelet de Saracibar Bosch, Carlos; Boman, Romain; Bussetta, Philippe; Cajas García, Juan Carlos; Cervera Ruiz, Miguel; Chiumenti, Michele; Coll Sans, Abel; Dadvand, Pooyan; Hernández Ortega, Joaquín Alberto; Houzeaux, Guillaume; Pasenau de Riera, Miguel; Ponthot, Jean Philippe (Wiley, 2016)
      Capítol de llibre
      Accés restringit per política de l'editorial
      As one of the results of an ambitious project, this handbook provides a well-structured directory of globally available software tools in the area of Integrated Computational Materials Engineering (ICME). The compilation ...

    • On the formation of Taylor-Görtler structures in the vortex induced vibration phenomenon 

      Pastrana Maldonado, Daniel; Rodríguez Pérez, Ivette María; Cajas García, Juan Carlos; Lehmkuhl Barba, Oriol; Houzeaux, Guillaume (2020-06-01)
      Article
      Accés obert
      In this work, the three-dimensional structure of the boundary layer in the context of the vortex induced vibration of a circular cylinder is presented and investigated for the first time. Large-eddy simulations of a low ...

    • On the role of a centrifugal instability in the vortex-induced vibration of a two-degrees of freedom circular cylinder at moderate Reynolds numbers 

      Pastrana, Daniel; Cajas García, Juan Carlos; Lehmkuhl Barba, Oriol; Rodríguez Pérez, Ivette María; Vázquez, Mariano; Houzeaux, Guillaume (2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this work, the formation and role of a centrifugal instability in the VIV phenomenon at moderate Reynolds numbers are investigated for the ¿rst time. Large eddy simulations of a low mass ratio (m = 2.6) two-degree-of-freedom ...

    • Parallel embedded boundary methods for fluid and rigid-body interaction 

      Samaniego, Cristóbal; Houzeaux, Guillaume; Samaniego, Esteban; Vázquez, Mariano (Elsevier, 2015-06-15)
      Article
      Accés obert
      The implementations of an updated body-fitted and a non body-fitted method to deal with the interaction of a fluid and a rigid body are described. The physics of the fluid is modeled by the incompressible Navier-Stokes ...

    • Parallel Implementation of Domain Composition Methods 

      Houzeaux, Guillaume; Cajas García, Juan Carlos; Eguzkitza, Beatriz; Vázquez, Mariano (Saxe-Coburg Publications, 2015-04)
      Capítol de llibre
      Accés obert
      Domain composition methods (DCM) consist of obtaining a solution to a problem on a domain, from the formulations of the same problem expressed on various subdomains. These methods have therefore the oppostive objective to ...

    • Parallel mesh partitioning based on space filling curves 

      Borrell, Ricard; Cajas García, Juan Carlos; Mira Martínez, Daniel; Taha, A.; Koric, S.; Vázquez, Mariano; Houzeaux, Guillaume (Elsevier, 2018-09)
      Article
      Accés obert
      Larger supercomputers allow the simulation of more complex phenomena with increased accuracy. Eventually this requires finer and thus also larger geometric discretizations. In this context, and extrapolating to the Exascale ...

    • Parallel Mesh Partitioning in Alya 

      Artigues, Antoni; Houzeaux, Guillaume (2015)
      Report de recerca
      Accés obert
      The Alya System is the BSC simulation code for multi-physics problems [1]. It is based on a Variational Multiscale Finite Element Method for unstructured meshes. Work distribution is achieved by partitioning the original ...

    • 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 obert
      Modern 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 ...

    • ParaView + Alya + D8tree: Integrating high performance computing and high performance data analytics 

      Artigues, Antoni; Cugnasco, Cesare; Becerra Fontal, Yolanda; Cucchietti, Fernando; Houzeaux, Guillaume; Vázquez, Mariano; Torres Viñals, Jordi; Ayguadé Parra, Eduard; Labarta Mancho, Jesús José (Elsevier, 2017)
      Article
      Accés obert
      Large scale time-dependent particle simulations can generate massive amounts of data, making it so that storing the results is often the slowest phase and the primary time bottleneck of the simulation. Furthermore, analysing ...

    • Performance Evaluation of Multiple Cloud Data Centers Allocations for HPC 

      Roloff, Eduardo; Carreño, Emmanuell D.; Valverde-Sanchez, Jimmy K.M.; Diener, Matthias; Serpa, Matheus da Silva; Houzeaux, Guillaume; Schnorr, Lucas M.; Maillard, Nicolas; Gaspary, Luciano P.; Navaux, Philippe (Springer International Publishing, 2017-04-29)
      Comunicació de congrés
      Accés obert
      This paper evaluates the behavior of the Microsoft Azure G5 cloud instance type over multiple Data Centers. The purpose is to identify if there are major differences between them and to help the users choose the best option ...

    • Recent ship hydrodynamics developments in the parallel two-fluid flow solver Alya 

      Owen, Herbert; Houzeaux, Guillaume; Samaniego, Cristobal; Lesage, Anne C.; Vázquez, Mariano (Elsevier, 2013-07-10)
      Article
      Accés obert
      CFD modeling of turbulent free surface flows has become an important tool in the design of ship hulls. A two-fluid flow solver that can predict the flow pattern, free surface shape and the forces on the ship hull is ...