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Increasing the Flexibility of the High Order Discontinuous Galerkin Framework FLEXI Towards Large Scale Industrial Applications

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High Performance Computing in Science and Engineering '20

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Abstract

This paper summarizes our progress in the application and improvement of a high order discontinuous Galerkin (DG) method for scale resolving fluid dynamics simulations towards robust and flexible industrial applications. We report the results obtained on the Cray XC40 Hazel Hen cluster at HLRS and show code performance. We present three application cases and developments: An implicit time integration scheme for split-form DG schemes allows us to solve stiff problems with increased efficiency, which will open up new classes of problems for simulations with FLEXI. We follow this by discussing a Large Eddy Simulation (LES) of a compressible turbulent boundary layer and provide comparison to DNS data. Lastly, we demonstrate how to extend the high order scheme with a consistent and conservative sliding mesh interface, and present results of a 1.5 stage turbine simulation with wall-resolved LES.

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Acknowledgements

We thank the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) for supporting this work by funding - EXC2075 – 390740016 under Germany’s Excellence Strategy. We acknowledge the support by the Stuttgart Center for Simulation Science (SimTech) and the DFG International Research Training Group GRK 2160. Min Gao recognizes the support of the China Scholarship Council (CSC). We all truly appreciate the ongoing kind support by HLRS in Stuttgart.

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Authors and Affiliations

  1. Institute of Aerodynamics and Gas Dynamics, University of Stuttgart, Stuttgart, Germany

    Min Gao, Daniel Kempf, Nico Krais, Marius Kurz, Jonas Zeifang & Claus-Dieter Munz

  2. Institute of Aircraft Propulsion Systems, University of Stuttgart, Stuttgart, Germany

    Patrick Kopper

  3. Laboratory of Fluid Dynamics and Technical Flows, Otto-von-Guericke University Magdeburg, Magdeburg, Germany

    Andrea Beck

Authors
  1. Andrea Beck
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  2. Min Gao
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  3. Daniel Kempf
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  4. Patrick Kopper
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  5. Nico Krais
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  6. Marius Kurz
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  7. Jonas Zeifang
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  8. Claus-Dieter Munz
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Correspondence to Andrea Beck .

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Editors and Affiliations

  1. Zentrum für Informationsdienste und Hochleistungsrechnen (ZIH), Technische Universität Dresden, Dresden, Germany

    Wolfgang E. Nagel

  2. Abteilung für Angewandte Mathematik, Universität Freiburg, Freiburg, Germany

    Dietmar H. Kröner

  3. Höchstleistungsrechenzentrum Stuttgart (HLRS), Universität Stuttgart, Stuttgart, Germany

    Michael M. Resch

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Beck, A. et al. (2021). Increasing the Flexibility of the High Order Discontinuous Galerkin Framework FLEXI Towards Large Scale Industrial Applications. In: Nagel, W.E., Kröner, D.H., Resch, M.M. (eds) High Performance Computing in Science and Engineering '20. Springer, Cham. https://doi.org/10.1007/978-3-030-80602-6_22

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