Title: A boundary reconstruction scheme for lattice Boltzmann flow simulation in porous media

Authors: K. Suga, T. Tanaka, Y. Nishio, M. Murata

Addresses: Department of Mechanical Engineering, Osaka Prefecture University, Sakai, 599-8531, Japan. ' Department of Mechanical Engineering, Osaka Prefecture University, Sakai, 599-8531, Japan. ' Department of Mechanical Engineering, Osaka Prefecture University, Sakai, 599-8531, Japan. ' Department of Mechanical Engineering, Osaka Prefecture University, Sakai, 599-8531, Japan

Abstract: A novel boundary reconstruction scheme is developed utilising the reinitialisation scheme of the Level Set Method (LSM). The proposed scheme transfers usual digitally defined step-like boundary data to continuously smooth surface data. It is confirmed that the lattice boltzmann simulation by the Interpolated Bounce-Back (IBB) Boundary Condition (BC) with the present scheme well reproduces the drag coefficients of a cylinder and a sphere. Then this numerical scheme is applied to simulate flows in porous media which have the body-centred cubic structure. The results indicate that the present scheme improves the shape representation and thus the prediction accuracy is less sensitive to grid resolutions.

Keywords: LBM; lattice Boltzmann method; porous media; boundary reconstruction; level set function; flow simulation; reinitialisation; level set method; drag coefficients; shape representation; prediction accuracy.

DOI: 10.1504/PCFD.2009.024820

Progress in Computational Fluid Dynamics, An International Journal, 2009 Vol.9 No.3/4/5, pp.201 - 207

Published online: 01 May 2009 *

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