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回転球に作用する負のマグヌス力の数値解析

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Title: 回転球に作用する負のマグヌス力の数値解析
Other Titles: Numerical Simulation of Negative Magnus Force on a Rotating Sphere
Authors: 武藤, 昌也1 Browse this author
坪倉, 誠2 Browse this author →KAKEN DB
大島, 伸行3 Browse this author →KAKEN DB
Authors(alt): Muto, Masaya1
Tsubokura, Makoto2
Oshima, Nobuyuki3
Keywords: Boundary Layer
Transition
Separation
Large-Eddy Simulation
Issue Date: 2011
Publisher: 日本機械学会
Journal Title: 日本機械学會論文集. B編
Volume: 77
Issue: 775
Start Page: 781
End Page: 792
Abstract: Flow characteristics and fluid force on a sphere rotating along with axis perpendicular to mean air flow were investigated using Large Eddy Simulation (LES) at two different Reynolds numbers Re_[p] of 1.0×10^[4] and 2.0×10^[5]. As a result of simulation, opposite flow characteristics around the sphere and displacement of the separation point were visualized depending on the Reynolds number even though rotation speed according to the Reynolds number is the same. When the sphere rotates at some specific rotation velocity and at Re_[p] = 1.0×10^[4], flow characteristics agree with the flow field explained in the Magnus effect. While sphere rotates at the same rotation velocity while increasing Re_[p] to 2.0×10^[5], separation point moves in opposite direction and wake appears in the different direction. The reason of the negative Magnus force was discussed in terms of the boundary layer transition on the surface.
Rights: © 2011 日本機械学会
https://www.jsme.or.jp/
Type: article (author version)
URI: http://hdl.handle.net/2115/52225
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 坪倉 誠

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