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周囲に周期変動が与えられた球に負荷する流体力
| Title: | 周囲に周期変動が与えられた球に負荷する流体力 |
| Other Titles: | Fluid Force on a Sphere Exposed to Periodic Fluctuation |
| Authors: | 武藤, 昌也1 Browse this author | | 坪倉, 誠2 Browse this author →KAKEN DB | | 大島, まり3 Browse this author | | 大島, 伸行4 Browse this author →KAKEN DB |
| Authors(alt): | Muto, Masaya1 | | Tsubokura, Makoto2 | | Oshima, Marie3 | | Oshima, Nobuyuki4 |
| Keywords: | Gas-Solid Two-Phase Flow | | Turbulent Flow | | Drag Reduction |
| Issue Date: | 25-Apr-2010 |
| Publisher: | 日本機械学会 |
| Journal Title: | 日本機械学會論文集. B編 |
| Volume: | 76 |
| Issue: | 764 |
| Start Page: | 563 |
| End Page: | 569 |
| Abstract: | Flow aspects near a particle are observed using a numerical simulation of periodically rotating spherical particle in a uniform flow or static particle in a periodically oscillating flow, to investigate a modulation of drag force. As a result, a reduction of drag force is found and it depends on period and amplitude of the rotation or the oscillation. A reason of the reduction of drag force is caused by a reduction of friction force on the particle. And the reduction of the friction force is induced by a concentration of the fluctuation energy of the flow by the rotation or the oscillation on the vicinity of the particle in case Stokes layer thickness, which is estimated using a frequency of the rotation or the oscillation, is comparable or smaller than the thickness of boundary layer of the particle that is estimated in a laminar flow. |
| Rights: | © 2010 日本機械学会 | | https://www.jsme.or.jp/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/52224 |
| 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)
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Submitter: 坪倉 誠
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