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Interface-Resolved Direct Numerical Simulation of Turbulent Flow over Porous Media

In: High Performance Computing in Science and Engineering '19

Author

Listed:
  • Xu Chu

    (University of Stuttgart, Institute of Aerospace Thermodynamics)

  • Johannes Müller

    (University of Stuttgart, Institute of Aerospace Thermodynamics)

  • Bernhard Weigand

    (University of Stuttgart, Institute of Aerospace Thermodynamics)

Abstract

Direct numerical simulations (DNS) are conducted for turbulent flows over porous media. A high-order spectral/hp element method is adopted for solving the incompressible Navier-Stokes equations. Resolving flow details close to the interface relies on an adaptive polynomial refinement based on a conforming mesh. Four DNS cases up to bulk Reynolds number $$Re=15{,}000$$ R e = 15 , 000 are conducted with a total mesh resolution up to 1 billion degrees of freedom. The highly-resolved DNS enables us to focus on two major physical phenomenon: (i) the turbulence modulation including drag reduction and flow control; (ii) the turbulent/non-turbulent interface close to the porous surface. The numerical solver exhibits an excellent scalability up to 96k cores on Hazel Hen. Strong scaling tests indicate an efficiency of 70 $$\%$$ % with around 5, 000 mesh-nodes per core, which indicates a high potential for an adequate use of current and next-generation HPC platforms to investigate turbulent flows over porous media.

Suggested Citation

  • Xu Chu & Johannes Müller & Bernhard Weigand, 2021. "Interface-Resolved Direct Numerical Simulation of Turbulent Flow over Porous Media," Springer Books, in: Wolfgang E. Nagel & Dietmar H. Kröner & Michael M. Resch (ed.), High Performance Computing in Science and Engineering '19, pages 343-354, Springer.
    • Handle: RePEc:spr:sprchp:978-3-030-66792-4_23
    DOI: 10.1007/978-3-030-66792-4_23
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