Exploració per autor "Baez Vidal, Aleix"Més informació

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    • A filtered kinetic energy preserving finite volumes scheme for compressible flows 

      Baez Vidal, Aleix; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David; Oliva Llena, Asensio (2012)
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      The Kinetic Energy Preserving Scheme (KEP) for compressible flows has been shown to solve 1-D shock waves without smearing them. The method does not add numerical diffusion to solutions but, as a counterpart, it needs ...

    • A General Method to Compute Numerical Dispersion Error 

      Ruano Pérez, Jesús; Baez Vidal, Aleix; Rigola Serrano, Joaquim; Trias Miquel, Francesc Xavier (2021)
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      This article presents a new methodology to compute numerical dispersion error. The analysis here presented is not restricted to uniform structured meshes nor linear discrete operators as it does not rely on sinusoids to ...

    • A new general method to compute dispersion errors on Cartesian stretched meshes for both linear and non-linear operators 

      Ruano Pérez, Jesús; Baez Vidal, Aleix; Rigola Serrano, Joaquim; Trias Miquel, Francesc Xavier (2022-02-01)
      Article
      Accés restringit per política de l'editorial
      The present article presents a new analysis for the dispersion error and the methodology to evaluate it numerically. Here we present the spectral properties of several convective schemes, including non-linear ones, on ...

    • Direct numerical simulation and Large-Eddy simulations of the turbulent flow around a NACA-0012 airfoil 

      Lehmkuhl Barba, Oriol; Baez Vidal, Aleix; Rodríguez Pérez, Ivette María; Pérez Segarra, Carlos David (2011)
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      This paper investigates the capabilities of two subgrid-scale (SGS) models for predicting the complex flow in transitional separated bubbles. We consider here the flow over a NACA 0012 airfoil at Reynolds number Re = 5×10 ...

    • Direct Numerical Simulation of the turbulent flow around a NACA 0012 airfoil at different angles of attack 

      Baez Vidal, Aleix; Lehmkuhl Barba, Oriol; Rodríguez Pérez, Ivette María; Pérez Segarra, Carlos David (2011)
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      Direct numerical simulations (DNS) of the flow dynamics over a NACA 0012 airfoil at Reynolds number Re = 5×104 at different angles of attack are presented. The dynamic of the large separation bubble, characterised by laminar ...

    • Filtering in the numerical simulation of turbulent compressible flow with sysmmetry preserving discretizations 

      Baez Vidal, Aleix (Universitat Politècnica de Catalunya, 2019-01-10)
      Tesi
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      The present thesis investigates how explicit filters can be useful in numerical simulations of turbulent, compressible flow with symmetry preserving discretizations. Such explicit filters provide stability to simulations ...

    • Flow over a realistic car model: wall modeled large eddy simulations assessment and unsteady effects 

      Aljure Osorio, David E.; Calafell Sandiumenge, Joan; Baez Vidal, Aleix; Oliva Llena, Asensio (2018-03-01)
      Article
      Accés obert
      Numerical simulations are carried out on the flow over a realistic generic car geometry, the DrivAer-fastback car model. Pure large eddy simulations (LES) and wall-modeled large eddy simulations (WMLES) are used and compared ...

    • 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)
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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 ...

    • On the extension of RANS/LES methods from incom-pressible to compressible transonic turbulent flows with SBLI 

      Pedro Costa, Juan Bautista; Baez Vidal, Aleix; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David; Oliva Llena, Asensio (Begell House, 2015)
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      Accés restringit per política de l'editorial
      In the present work, a compressible extension of the incompressible RANS and LES models implemented in TermoFluids is carried out. The objective is to solve compressible turbulent flows, i.e. high-Reynolds and high-Mach ...

    • On the properties of discrete spatial filters for CFD 

      Baez Vidal, Aleix; Lehmkuhl Barba, Oriol; Trias Miquel, Francesc Xavier; Pérez Segarra, Carlos David (2016-12-01)
      Article
      Accés obert
      The spatial filtering of variables in the context of Computational Fluid Dynamics (CFD) is a common practice. Most of the discrete filters used in CFD simulations are locally accurate models of continuous operators. However, ...

    • Parallel large eddy simulations of wind farms with the actuator line method 

      Baez Vidal, Aleix; Lehmkuhl Barba, Oriol; Martínez Valdivieso, Daniel; Pérez Segarra, Carlos David (Elsevier, 2013)
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      Parallel Computation of wind farm Large Eddy Simulations (LES) requires the use of with Wind Turbine Models (WTM). CFD and WTM demand different domain decompositions as optimal CFD and WTM decompositions do not necessarily ...