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Simulations of Fully Developed Channel Flow by a New High-Resolution Scheme of the Finite-Difference Lattice Boltzmann Method

[+] Author Affiliations
Yuichi Kunishima, Takeo Kajishima

Osaka University, Suita, Japan

Michihisa Tsutahara

Kobe University, Kobe, Japan

Paper No. AJKFluids2015-12613, pp. V01AT12A003; 5 pages
doi:10.1115/AJKFluids2015-12613
From:
  • ASME/JSME/KSME 2015 Joint Fluids Engineering Conference
  • Volume 1A: Symposia, Part 2
  • Seoul, South Korea, July 26–31, 2015
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 978-0-7918-5721-3
  • Copyright © 2015 by JSME

abstract

This study deals with the aerodynamic noise caused by complex configurations of industrial products. Computational fluid dynamics (CFD) is useful approach to analyze radiated sounds and flows around them. The finite-difference lattice Boltzmann method (FD-LBM) is an expansion of LBM using the finite-difference discretization. It can implement on a body-fitted grid which has been preferably used under the view of computational cost and accuracy. Against huge computational cost in direct simulation of aerodynamic sound, FD-LBM has attained high resolution for sound wave. It is also important to handle turbulence with reasonable computational cost, for flows are often turbulent in engineering applications. We introduced a higher-order upwind biased scheme into the FD-LBM to achieve high resolution for turbulence. We also proposed a procedure to control down the artificial dissipation. We validated the schemes by the simulation of fully developed channel flow (Rτ ≅ 180). Satisfactory results were acquired on the resolutions which were used in direct numerical simulations with conventional CFD methods. The modification was efficacious against lack of resolution on coarser grids.

Copyright © 2015 by JSME

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