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	2021
形態種別	外国学会誌（その他）
査読	査読あり
標題	Dissimilarity Between Heat and Momentum Transfer of Turbulent Heat Transfer over Surfaces with Hemisphere Protrusions
執筆形態	共著・編著（代表編著を除く）
掲載誌名	Springer Proceedings in Physics
掲載区分	国外
出版社・発行元	Springer Science and Business Media Deutschland GmbH
巻・号・頁	267,pp.115-121
担当区分	最終著者
著者・共著者	Rika Nagura,Yusuke Kuwata,Kazuhiko Suga
概要	To explore how the roughness arrangement affects the turbulent heat transfer, direct numerical simulations of turbulent heat transfer over walls with regularly distributing hemisphere protrusions were performed by the lattice Boltzmann method. The friction Reynolds number was fixed at 660 and the fluid Prandtl number was 0.71 assuming an air flow. The roughness increases the momentum transfer more than the heat transfer. The Reynolds analogy factor, which measures the dissimilarity between the momentum and heat transfer, can be expressed as a function of the skin friction coefficient, inner-scaled equivalent roughness, and Prandtl number regardless of the roughness arrangement.
DOI	10.1007/978-3-030-80716-0_16
ISSN	1867-4941