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A New Approach for Error Reduction in the Volume Penalization Method

Published online by Cambridge University Press:  03 June 2015

Wakana Iwakami ,
Yuzuru Yatagai ,
Nozomu Hatakeyama  and
Yuji Hattori
Wakana Iwakami*
Affiliation:
Yukawa Institute for Theoretical Physics, Kyoto University, Oiwake-cho, Kitashirakawa, Sakyo-ku, Kyoto 606-8502, Japan Advanced Research Institute for Science & Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan
Yuzuru Yatagai*
Affiliation:
Department of Applied Information Sciences, Graduate School of Information Sciences, Tohoku University, 6-3-09 Aoba, Aramaki-aza, Aoba-ku, Sendai, Miyagi 980-8579, Japan
Nozomu Hatakeyama*
Affiliation:
NICHe, Tohoku University, 6-6-10 Aoba, Aramaki-aza, Aoba-ku, Sendai, Miyagi 980-8579, Japan
Yuji Hattori*
Affiliation:
Institute of Fluid Science, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi, 980-8577, Japan
*
Corresponding author.Email:[email protected]
Email:[email protected]
Email:[email protected]
Email:[email protected]
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Abstract

A new approach for reducing error of the volume penalization method is proposed. The mask function is modified by shifting the interface between solid and fluid by toward the fluid region, where v and η are the viscosity and the permeability, respectively. The shift length is derived from the analytical solution of the one-dimensional diffusion equation with a penalization term. The effect of the error reduction is verified numerically for the one-dimensional diffusion equation, Burgers’ equation, and the two-dimensional Navier-Stokes equations. The results show that the numerical error is reduced except in the vicinity of the interface showing overall second-order accuracy, while it converges to a non-zero constant value as the number of grid points increases for the original mask function. However, the new approach is effectivewhen the grid resolution is sufficiently high so that the boundary layer,whose width is proportional to , is resolved. Hence, the approach should be used when an appropriate combination of ν and η is chosen with a given numerical grid.

Keywords

60-08Volume penalization methodimmersed boundary methodcompact schemeerror reduction
Type
Research Article
Information
Communications in Computational Physics , Volume 16 , Issue 5 , November 2014 , pp. 1181 - 1200
Copyright
Copyright © Global Science Press Limited 2014

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