The flow around a cylindrical body standing on the sand is computed numerically and the movement of the sand is investigated. The numerical method employed in this study can be divided into three parts : (1) calculation of the flow around the pole using the marker and cell (MAC) method with a generalized coordinate system; (2) estimation of the sand transfer caused by the flow through friction; (3) determination of the shape of the ground. Since the computational area changes at step (3), this procedure has to be repeated at each time step. Results show that the horseshoe vortex scoops out the ground in front of the pole. When the pole stands vertically on a flow, it generates a big horseshoe vortex to make the scouring force strong. On the other hand, when the pole has a cross section that is flatter along the flow, such as a lens or ellipse, the scouring force becomes weaker. Furthermore, it is found that the horseshoe vortex becomes smaller when the pole has a conical base.
雑誌名
JSME international journal. Series B, Fluids and thermal engineering
巻
44
号
3
ページ
427 - 433
発行年
2001-08-15
ISSN
13408054
書誌レコードID
AA10888815
権利
社団法人日本機械学会
本文データは学協会の許諾に基づきCiNiiから複製したものである
フォーマット
application/pdf
形態
650101 bytes
著者版フラグ
publisher
日本十進分類法
420
NIIサブジェクト
物理学
出版者
社団法人日本機械学会
資源タイプ
学術雑誌論文
資源タイプ・ローカル
学術雑誌論文
資源タイプ・NII
Journal Article
資源タイプ・DCMI
text
資源タイプ・ローカル表示コード
01
異版である
http://ci.nii.ac.jp/naid/110003474269
所属
Showa High School
Graduate School of Humanities and Sciences, Ochanomizu University
The Institute of Space and Astronautical Science
Numerical Study of the Sand Movement around a Cylindrical Body Standing on the Sand
JSME44(3).pdf
(650.1KB)
