スガ　カズヒコ   Kazuhiko Suga   須賀　一彦    所属   追手門学院大学  理工学部 機械工学科    職種   教授
言語種別	英語
発行・発表の年月	2015/01
形態種別	外国学術誌（その他）
査読	査読あり
標題	Anomaly of the lattice Boltzmann methods in three-dimensional cylindrical flows
執筆形態	共著・編著（代表編著を除く）
掲載誌名	JOURNAL OF COMPUTATIONAL PHYSICS
掲載区分	国外
出版社・発行元	ACADEMIC PRESS INC ELSEVIER SCIENCE
巻・号・頁	280,pp.563-569
担当区分	最終著者,責任著者
著者・共著者	Y. Kuwata,K. Suga
概要	Truncation error terms of the lattice Boltzmann equation (LBE) are analysed for three-dimensional flow simulations by the D3Q15, D3Q19 and D3Q27 models. By applying the analysis of Holdych et al. (2004) [9], rotational invariance of the Reynolds averaged error terms is examined in cylindrical coordinates. It is found that error terms distribute cyclically in the circumferential direction and produce false forces in particular directions by the D3Q15 and D3Q19 models. When flow becomes turbulent, this tendency is reinforced by the Reynolds stress resulting in the generation of obvious spurious currents. By the D3Q27 model, it is confirmed that the LBE keeps rotational invariance in laminar flows whilst non-axisymmetric error terms arise in turbulent flows. However, the magnitudes of the error terms are less than two percent of those by the D3Q15 and D3Q19 models and hence unphysical spurious currents are sufficiently weak. (C) 2014 Elsevier Inc. All rights reserved.
DOI	10.1016/j.jcp.2014.10.002
ISSN	0021-9991/1090-2716
Put Code(ORCID)	21907738
PermalinkURL	http://orcid.org/0000-0001-9313-1816