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Numerical Simulation for Friction Factor of Laminar Flow of
Water in Microchannels with MicroPinFin Arrays
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DONG Lining,QUAN Xiaojun,CHENG Ping
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(School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China)
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Abstract Numerical simulations were conducted for the laminar flow of water through 22 microchannels with staggered square short micropinfin arrays with various geometry parameters in the Reynolds number range of 5 to 400. The effects of height and pitch of pinfin arrays on laminar flow friction factor were investigated. An empirical correlation was developed as a function of porosity and tortuosity, Reynolds number, and aspect ratio. It is found that this correlation can predict the friction factor in microchannels with micropinfin accurately. It is expected that this novel form of correlation equations can be extended for micro pinfin arrays with complex and irregular geometries and porous media with complex microstructures.
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Received: 23 December 2009
Published: 30 November 2010
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