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Simulation of Flow over Pseudo-Random Rough Surfaces

In: High Performance Computing in Science and Engineering '20

Author

Listed:
  • J. Yang

    (Karlsruhe Institute of Technoligy (KIT), Institute of Fluid Mechanics (ISTM))

  • A. Stroh

    (Karlsruhe Institute of Technoligy (KIT), Institute of Fluid Mechanics (ISTM))

  • P. Forooghi

    (Aarhus University, Department of Mecahnical and Production Engineering)

Abstract

Direct Numerical Simulation (DNS) is used to study fully developed turbulent flow over a number of irregular rough surfaces in periodic plane channels. DNS in minimal channels, initially proposed by Chung et al. [7], is examined and generalized in the present research. To this end the DNS results for flow in channels with reduced streamwise and spanwise sizes (so-called minimal channels) are compared to those in large channels. Generation of roughness is based on a mathematical algorithm in which the height power spectrum of the roughness along with its height probability distribution can be prescribed (hence the term “pseudo-random” rough surface). This approach allows generation of roughness samples that may be considered as surrogates of realistic roughness and can replace the costly process of scanning industrial surfaces.

Suggested Citation

  • J. Yang & A. Stroh & P. Forooghi, 2021. "Simulation of Flow over Pseudo-Random Rough Surfaces," Springer Books, in: Wolfgang E. Nagel & Dietmar H. Kröner & Michael M. Resch (ed.), High Performance Computing in Science and Engineering '20, pages 387-400, Springer.
    • Handle: RePEc:spr:sprchp:978-3-030-80602-6_25
    DOI: 10.1007/978-3-030-80602-6_25
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