SIMULATION OF FLOW PAST A CIRCULAR CYLINDER USING ENTROPIC LATTICE BOLTZMANN METHOD

Chuan Gu (), Shyam S. Chikatamarla () and Iliya V. Karlin ()
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Chuan Gu: LAV, Institute of Energy Technology, ETH Zurich, Switzerland
Shyam S. Chikatamarla: LAV, Institute of Energy Technology, ETH Zurich, Switzerland
Iliya V. Karlin: LAV, Institute of Energy Technology, ETH Zurich, Switzerland

International Journal of Modern Physics C (IJMPC), 2014, vol. 25, issue 01, 1-8

Abstract: The entropic lattice Boltzmann method (ELBM) has been demonstrated to bring unconditional stability and accuracy to sub-gird flow simulations. However, the application of ELBM to engineering flows were restricted so far due to the lack of a matching wall boundary condition that retains the accuracy of the method for both resolved and under-resolved simulations. To this end, we show that the recently proposed wall boundary condition for ELBM is reliable and accurate for both these regimes. Three-dimensional (3D) flow past a circular cylinder is taken as a benchmark to show that ELBM is both stable and accurate for range of Reynolds numbers and grid sizes. Several key parameter of this flow are studied in detail.

Keywords: Lattice Boltzmann method; turbulent flow (search for similar items in EconPapers)
Date: 2014
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DOI: 10.1142/S012918311340024X

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