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	2015/11
形態種別	外国学術誌（その他）
査読	査読あり
標題	Heat transfer enhancement by external magnetic field for paramagnetic laminar pipe flow
執筆形態	共著・編著（代表編著を除く）
掲載誌名	INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
掲載区分	国外
出版社・発行元	PERGAMON-ELSEVIER SCIENCE LTD
巻・号・頁	90,pp.388-395
担当区分	最終著者
著者・共著者	Masayuki Kaneda,Akira Tsuji,Hiroki Ooka,Kazuhiko Suga
概要	Effect of an external magnetic field is numerically investigated in laminar pipe flow of a paramagnetic fluid. A single current-carrying coil is presumed for the magnet and the pipe is heated at a constant heat flux. It is found that the effect on the heat and fluid flow strongly depends on the coil location, resulting in local heat transfer enhancement/suppression. Only when the coil is placed at threshold of the heating zone, the enhancement is achieved. This is due to the magnetothermal force which attracts cold fluid toward the coil, and the force induces boundary layer thinning behind the coil. In the case, the heat transfer enhancement at the threshold remains approximately 10% at Reynolds number of 10 in no-gravitational field, although the enhancement decreases with the increase of the Reynolds number under constant magnetic induction. Computations in the presence of the gravity reveals that the magnetothermal force becomes effective especially at upper region.
DOI	10.1016/j.ijheatmasstransfer.2015.06.078
ISSN	0017-9310/1879-2189
Put Code(ORCID)	41807881
PermalinkURL	http://www.scopus.com/inward/record.url?eid=2-s2.0-84936882689&partnerID=MN8TOARS
researchmap用URL	http://orcid.org/0000-0001-9313-1816