Browsing by Author "Borrell, Ricard"

Now showing items 1-9 of 9

    • Extension of the parallel Sparse Matrix Vector Product (SpMV) for the implicit coupling of PDEs on non-matching meshes 

      Houzeaux, Guillaume; Borrell, Ricard; Cajas García, Juan Carlos; Vázquez, Mariano (Elsevier, 2018-09-15)
      Article
      Open Access
      The Sparse Matrix Vector Product (SpMV) is one of the main operations of iterative solvers, and, in a parallel context, it is also the siege of point-to-point communications between the neighboring MPI processes. The ...

    • Heterogeneous CPU/GPU co-execution of CFD simulations on the POWER9 architecture: Application to airplane aerodynamics 

      Borrell, Ricard; Dosimont, Damien; Garcia Gasulla, Marta; Houzeaux, Guillaume; Lehmkuhl Barba, Oriol; Mehta, Vishal; Owen, Herbert; Vázquez, Mariano; Oyarzun Altamirano, Guillermo (Elsevier, 2020-06)
      Article
      Open Access
      High fidelity Computational Fluid Dynamics simulations are generally associated with large computing requirements, which are progressively acute with each new generation of supercomputers. However, significant research ...

    • High-Performance Computing: Do’s and Dont’s 

      Houzeaux, Guillaume; Borrell, Ricard; Fournier, Yvan; Garcia-Gasulla, Marta; Göbbert, Jens H.; Hachem, Elie; Mehta, Vishal; Mesri, Youssef; Owen, Herbert; Vázquez, Mariano (InTech, 2018-02-14)
      Part of book or chapter of book
      Open Access
      Computational fluid dynamics (CFD) is the main field of computational mechanics that has historically benefited from advances in high-performance computing. High-performance computing involves several techniques to make a ...

    • LES-based Study of the Roughness Effects on the Wake of a Circular Cylinder from Subcritical to Transcritical Reynolds Numbers 

      Rodriguez, Ivette; Lehmkuhl Barba, Oriol; Piomelli, Ugo; Chiva, Jorge; Borrell, Ricard; Oliva, Assensi (Springer Verlag, 2017-12)
      Article
      Open Access
      This 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 ...

    • Numerical simulation of roughness effects on the flow past a circular cylinder 

      Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Piomelli, Ugo; Chiva Segura, Jorge; Borrell, Ricard; Oliva Llena, Asensio (Institute of Physics (IOP), 2016)
      Conference report
      Open Access
      In the present work large eddy simulations of the flow past a rough cylinder are performed at a Reynolds number of Re = 4.2 × 105 and an equivalent sand-grain surface roughness height ks = 0.02D. In order to determine the ...

    • 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, Ricard; Oliva Llena, Asensio (2014)
      Conference report
      Open Access

    • Parallel mesh partitioning based on space filling curves 

      Borrell, Ricard; Cajas García, Juan Carlos; Mira, Daniel; Taha, A.; Koric, S.; Vázquez, Mariano; Houzeaux, Guillaume (Elsevier, 2018-09)
      Article
      Open Access
      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 ...

    • The effects of roughness on the boundary layer development of a circular cylinder 

      Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Piomelli, Ugo; Chiva Segura, Jorge; Borrell, Ricard; Oliva Llena, Asensio (European Research Community on Flow, Turbulence, and Conbustion (ERCOFTAC), 2017)
      Conference report
      Restricted access - publisher's policy
      This paper focuses on the effects of surface roughness in the flow past a circular cylinder at different Reynolds numbers. Large eddy simulations of the flow, from subcritical to transcritical Reynolds numbers and at ...

    • Unsteady forces on a circular cylinder at critical Reynolds numbers 

      Lehmkuhl Barba, Oriol; Rodríguez Pérez, Ivette María; Borrell, Ricard; Chiva Segura, Jorge; Oliva Llena, Asensio (2014-12-23)
      Article
      Open Access
      It is well known that the flow past a circular cylinder at critical Reynolds number combines flow separation, turbulence transition, reattachment of the flow, and further turbulent separation of the boundary layer. The ...