| COMPUTATIONAL FLUID DYNAMICS （CFD） SIMULATIONS OF DRAG REDUCTION WITH PERIODIC MICRO-STRUCTURED WALL |
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| 作者姓名： | LI Gang ;ZHOU Ming ;WU Bo ;YE Xia ;CAI Lan |
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| 作者单位： | LI Gang（School of Automobile and Traffic Engineering,Jiangsu University,Zhenjiang 212013, China） ;
ZHOU Ming（School of Material Science and Engineering,Jiangsu University,Zhenjiang 212013, China） ;
WU Bo（School of Mechanical Engineering,Jiangsu University,Zhenjiang 212013, China） ;
YE Xia（School of Mechanical Engineering,Jiangsu University,Zhenjiang 212013, China） ;
CAI Lan（School of Mechanical Engineering,Jiangsu University,Zhenjiang 212013, China） ; |
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| 摘 要： | Computational fluid dynamics（CFD） simulations are adopted to investigate rectangular microchannel flows with various periodic micro-structured wall by introducing velocity slip boundary condition at low Reynolds number. The purpose of the current study is to numerically find out the effects of periodic micro-structured wall on the flow resistance in rectangular microchannel with the different spacings between microridges ranging from 15 to 60 pm. The simulative results indicate that pressure drop with different spacing between microridges increases linearly with flow velocity and decreases monotonically with slip velocity; Pressure drop reduction also increases with the spacing between microridges at the same condition of slip velocity and flow velocity. The results of numerical simulation are compared with theoretical predictions and experimental results in the literatures. It is found that there is qualitative agreement between them.
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| 关 键 词： | 流体动力学 模拟实验 制动还原 周期结构 |
COMPUTATIONAL FLUID DYNAMICS (CFD) SIMULATIONS OF DRAG REDUCTION WITH PERIODIC MICRO-STRUCTURED WALL |
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| LI Gang,;ZHOU Ming,;WU Bo,;YE Xia,;CAI Lan.COMPUTATIONAL FLUID DYNAMICS (CFD) SIMULATIONS OF DRAG REDUCTION WITH PERIODIC MICRO-STRUCTURED WALL[J].Chinese Journal of Mechanical Engineering,2008,21(2):77-80. |
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| Authors: | LI Gang ZHOU Ming WU Bo YE Xia CAI Lan |
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| Affiliation: | [1]School of Automobile and Traffic Engineering, Jiangsu University, Zhenj ang 212013, Ch na [2]School of Material Science and Engineering, Jiangsu University, Zhenjiang 212013, China |
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| Abstract: | Computational fluid dynamics(CFD) simulations are adopted to investigate rectangular microchannel flows with various periodic micro-structured wall by introducing velocity slip boundary condition at low Reynolds number. The purpose of the current study is to numerically find out the effects of periodic micro-structured wall on the flow resistance in rectangular microchannel with the different spacings between microridges ranging from 15 to 60 μm. The simulative results indicate that pressure drop with different spacing between microridges increases linearly with flow velocity and decreases monotonically with slip velocity; Pressure drop reduction also increases with the spacing between microridges at the same condition of slip velocity and flow velocity. The results of numerical simulation are compared with theoretical predictions and experimental results in the literatures. It is found that there is qualitative agreement between them. |
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| Keywords: | Reynolds numbers Slip velocity Drag reduction Computational fluid dynamics(CFD) simulations |
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