Enviaments recents

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

    Rodríguez Pérez, Ivette María; Lehmkuhl, Oriol; Piomelli, Ugo; Chiva Segura, Jorge; Borrell, Ricard; Oliva Llena, Asensio (Institute of Physics (IOP), 2016)
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    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 ...
  • Design of a test bench for measuring friction force in a piston-cylinder system 

    Buj Corral, Irene; Zayas Figueras, Enrique Ernesto; Álvarez Flórez, Jesús Andrés; Gutiérrez González, Ernesto (2016)
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    In the present work, design of a first approach of a test bench prototype for measuring friction in a piston-cylinder system is presented. The bench consists of a motor, belt and pulley transmission, crank mechanism, a ...
  • A new statistical model for subgrid dispersion in large eddy simulations of particle-laden flows 

    Muela Castro, Jordi; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David; Oliva Llena, Asensio (Institute of Physics (IOP), 2016)
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    Dispersed multiphase turbulent flows are present in many industrial and commercial applications like internal combustion engines, turbofans, dispersion of contaminants, steam turbines, etc. Therefore, there is a clear interest ...
  • Partitioned semi-implicit methods for simulation of biomechanical fluid-structure interaction problems 

    Naseri, Alireza; Lehmkuhl Barba, Oriol; González Acedo, Ignacio; Oliva Llena, Asensio (Institute of Physics (IOP), 2016)
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    This paper represents numerical simulation of fluid-structure interaction (FSI) system involving an incompressible viscous fluid and a lightweight elastic structure. We follow a semi-implicit approach in which we implicitly ...
  • A level-set method for thermal motion of bubbles and droplets 

    Balcázar Arciniega, Néstor; Oliva Llena, Asensio; Rigola Serrano, Joaquim (Institute of Physics (IOP), 2016)
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    A conservative level-set model for direct simulation of two-phase flows with thermocapillary effects at dynamically deformable interface is presented. The Navier-Stokes equations coupled with the energy conservation equation ...
  • Frost formation: optimizing solutions under a finite volume approach 

    Bartrons Casademont, Eduard; Pérez Segarra, Carlos David; Oliet Casasayas, Carles (Institute of Physics (IOP), 2016)
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    A three-dimensional transient formulation of the frost formation process is developed by means of a finite volume approach. Emphasis is put on the frost surface boundary condition as well as the wide range of empirical ...
  • Numerical simulations of conjugate convection combined with surface thermal radiation using an Immersed-Boundary Method 

    Favre Samarra, Federico; Colomer Rey, Guillem; Lehmkuhl Barba, Oriol; Oliva Llena, Asensio (Institute of Physics (IOP), 2016)
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    Dynamic and thermal interaction problems involving fluids and solids were studied through a finite volume based Navier-Stokes solver, combined with immersed-boundary techniques and the net radiation method. Source terms ...
  • On the solution of the full three-dimensional Taylor bubble problem by using a coupled Conservative Level Set - Moving Mesh method 

    Gutiérrez Álvarez, Enrique; Balcázar Arciniega, Néstor; Lehmkuhl Barba, Oriol; Oliva Llena, Asensio (Institute of Physics (IOP), 2016)
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    The challenging problem of the full three-dimensional Taylor bubble has been addressed by using a Conservative Level Set method in order to deal with the multiphase flow. A moving mesh is used, aiming to optimize the ...
  • New subgrid-scale models for large-eddy simulation of Rayleigh-Bénard convection 

    Dabbagh, Firas; Trias Miquel, Francesc Xavier; Gorobets, Andrei; Oliva Llena, Asensio (Institute of Physics (IOP), 2016)
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    At the crossroad between flow topology analysis and the theory of turbulence, a new eddy-viscosity model for Large-eddy simulation has been recently proposed by Trias et al.[PoF, 27, 065103 (2015)]. The S3PQR-model has the ...
  • On the extension of LES methods from incompressible to compressible turbulent flows with application to turbulent channel flow 

    Pedro Costa, Juan Bautista; Baez Vidal, Aleix; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David; Oliva Llena, Asensio (Institute of Physics (IOP), 2016)
    Text en actes de congrés
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    The objective of the present work is to validate the compressible Large-Eddy Simulation (LES) models implemented in the in house parallel unstructured CFD code TermoFluids. Our research team has implemented and tested ...

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