A new approach for error reduction in the volume penalizationmethod

Wakana Iwakami, Yuzuru Yatagai, Nozomu Hatakeyama, Yuji Hattori

研究成果: Article査読

5 被引用数 (Scopus)

抄録

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 √νη toward the fluid region, where ν and η are the viscosity and the permeability, respectively. The shift length √νη 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 √νη, is resolved. Hence, the approach should be used when an appropriate combination of ν and η is chosen with a given numerical grid.

本文言語English
ページ(範囲)1181-1200
ページ数20
ジャーナルCommunications in Computational Physics
16
5
DOI
出版ステータスPublished - 2014 11 1

ASJC Scopus subject areas

  • 物理学および天文学(その他)

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