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  • Large eddy simulation model assessment of the turbulent flow through dynamic compressor valves

     Estruch Perez, Olga; Lehmkuhl Barba, Oriol; Rigola Serrano, Joaquim; Oliva Llena, Asensio; Perez Segarra, Carlos David
    International Conference on Compressors and Coolants
    Presentation's date: 2013-09-03
    Presentation of work at congresses

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    The present paper attempts the dynamic simulation of the fluid flow through the valve reed taking into account valve movement due to piston displacement. This work widens previous studies based on numerical experiments with static geometry and constant boundary conditions. Hence, in this work attends the newly in-house implemented CFD and moving mesh coupled code TermoFluids. The CFD solver consists of a three-dimensional explicit finite volume fractional-step algorithm formulated in a second-order, conservative and collocated unstructured grid arrangement. Large eddy simulation is performed to solve the turbulent flow, using the subgrid scale WALE model. A radial basis function interpolation procedure is used to dynamically move the mesh according with the displacement of the valve. A simplified geometry of an axial hole plus a radial diffuser with a piston based inlet condition is considered. The valve dynamics is assumed to be given by a law according modal analysis of valve reed.

  • Transient and dynamic numerical simulation of the fluid flow through valves based on large eddy simulation models

     Estruch Perez, Olga; Lehmkuhl Barba, Oriol; Rigola Serrano, Joaquim; Oliva Llena, Asensio; Perez Segarra, Carlos David
    International Conference on Compressors and Their Systems
    p. 577-587
    Presentation's date: 2013-09-09
    Presentation of work at congresses

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    The present paper attempts the dynamic simulation of the fluid flow through valve reed using the in-house implemented CFD and moving mesh coupled code TermoFluids. The CFD solver is based on a parallel, second-order, conservative and unstructured finite volume discretization. Large eddy simulation is performed to solve the turbulent flow, using the subgrid scale WALE model. The moving mesh technique uses RBF interpolation. As a preliminary approach, a simplified geometry of an axial hole plus a radial diffuser with a piston based inlet condition is considered. The valve dynamics is modelled by a specific law according modal analysis of valve reed. © The author(s) and/or their employer(s), 2013.

  • A parallel radial basis function interpolation method for unstructured dynamic meshes

     Estruch Perez, Olga; Lehmkuhl Barba, Oriol; Borrell Pol, Ricard; Perez Segarra, Carlos David; Oliva Llena, Asensio
    Computers and fluids
    p. 1-11
    DOI: 10.1016/j.compfluid.2012.06.015
    Date of publication: 2012-06-22
    Journal article

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  • A parallel radial basis function interpolation method for unstructured dynamic meshes

     Estruch Perez, Olga; Borrell Pol, Ricard; Lehmkuhl Barba, Oriol; Perez Segarra, Carlos David
    International Conference on Parallel Computational Fluid Dynamics
    p. 1-2
    Presentation's date: 2012-05-25
    Presentation of work at congresses

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  • Large-eddy simulation of turbulent dynamic fluid-structure interaction

     Estruch Perez, Olga; Lehmkuhl Barba, Oriol; Borrell Pol, Ricard; Perez Segarra, Carlos David
    International Symposium on Turbulence, Heat and Mass Transfer
    Presentation's date: 2012-09-24
    Presentation of work at congresses

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  • Towards the high performance computing of molten salt tanks for CSP plants

     Rodriguez Pérez, Ivette Maria; Perez Segarra, Carlos David; Estruch Perez, Olga; Oliva Llena, Asensio; Lehmkuhl Barba, Oriol
    Solar Power and Chemical Energy Systems Conference
    Presentation's date: 2012-09-12
    Presentation of work at congresses

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  • Access to the full text
    A parallel three-dimensional radial basis function interpolation method for unstructured dynamic meshes  Open access

     Estruch Perez, Olga; Lehmkuhl Barba, Oriol; Borrell Pol, Ricard; Perez Segarra, Carlos David
    International Conference on Parallel Computational Fluid Dynamics
    p. 1-5
    Presentation's date: 2011-05-16
    Presentation of work at congresses

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    A radial basis function (RBF) interpolation method is implemented to be applied in computational fluid dynamics (CFD) problems with dynamic meshes. It is compared with the classic springs analogy smoothing, focusing on the mesh quality preserving and the computational cost. Moreover, the parallelization of the algorithms is critically analyzed. The main goal is to achieve simulations with meshes of millions of control volumes and run them with hundreds of processors, as well as to couple the adaptive of the grid to a CFD algorithm and extrapolate to a 3D application.

    Postprint (author’s final draft)