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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
YE Xia
CAI Lan
School of Mechanical Engineering,
Jiangsu University,
Zhenjiang 212013, China
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COMPUTATIONAL FLUID DYNAMICS (CFD)
SIMULATIONS OF DRAG REDUCTION WITH PERIODIC
MICRO-STRUCTURED WALL*
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.
Key words:
Reynolds numbers Slip velocity Drag reduction
Computational fluid dynamics(CFD) simulations
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Biographical notes
LI Gang is currently a PhD
candidate in School of Automobile and Traffic Engineering, Jiangsu
University, China. He dedicates on the research of advanced automobile
manufacturing technology and nanometer bionic technology, etc.
E-mail: ligang0794@163.com
ZHOU Ming is a professor in School of Material Science and Engineering,
Jiangsu University, China. He dedicates on the research of femtosecond
laser micro/nanoscale manufacturing technology, measurement of micro/nanoscale
component and inter-study between them and life science, etc.
E-mail: mzhou@ujs.edu.cn
WU Bo is a lecturer in School of Mechanical Engineering, Jiangsu
University, China. He dedicates on the research of bionic design of
mechanical non-smoothness surface.
E-mail: wobobh@ujs.edu.cn
YE Xia is currently a PhD candidate in School of Mechanical Engineering,
Jiangsu University, China. She dedicates on the research of bionic
design of mechanical non-smoothness surface.
E-mail: yexia@jstu.edu.cn
CAI Lan is a professor in School of Mechanical Engineering, Jiangsu
University, China. She dedicates on the research of advanced mechanical
manufacturing technology.
E-mail: cail@ujs.edu .cn
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