| Project/Area Number |
20760118
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Fluid engineering
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| Research Institution | Osaka Prefecture University |
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Principal Investigator |
SUGIOKA Ken-ichi Osaka Prefecture University, 大学院・工学研究科, 助教 (80438233)
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| Project Period (FY) |
2008 – 2009
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| Project Status |
Completed (Fiscal Year 2009)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2009: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2008: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
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| Keywords | 流体力 / 脈動流 / 直接数値計算法 / 粒子周りの流れ / Drag Force / Flow Structure around a rigid sphere / Oscillating flow / Numerical Simulation / 混相流 / カルマン渦 |
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| Research Abstract |
The fluid force acting on a rigid sphere in a uniform streamwise oscillating flow was numerically investigated by means of a three-dimensional direct numerical simulation (DNS) based on a marker and cell (MAC) method. In the particle Reynolds number region of 1 < Rep < 100, the conventional expression of drag force summing the standard drag, added mass force, pressure gradient force and history force (Maxey & Riley 1983 ; Auton, Hunt & Prud'homme 1988 ; Kim, Elghobashi & Sirignano 1998) is in good agreement with the DNS results of the drag force on a rigid sphere in an oscillating flow. In the high particle Reynolds number region of Rep>300, the conventional expression of fluid force cannot predict the effect of vortex shedding on the fluid force.
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