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Optimal Design and Operation on Convergent-Divergent Nozzle Type No-Moving-Part Valves (NMPV) in Microchannel

Published online by Cambridge University Press:  05 May 2011

T.-S. Leu ,
C.-T. Wang  and
J.-M. Sun
T.-S. Leu*
Affiliation:
Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan, Taiwan 70101, R.O.C.
C.-T. Wang*
Affiliation:
Department of Mechanical and Electro-Mechanical Engineering, National I Lan University, ILan, Taiwan 26047, R.O.C.
J.-M. Sun*
Affiliation:
Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan, Taiwan 70101, R.O.C.
*
* Associate Professor
** Associate Professor, corresponding author
*** Graduate studen
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Abstract

The no-moving-part valve (NMPV) pump design has been proven to be a better micro pump design for its easier fabrication, cost-effective and no destroying flow particle. Previous literatures often used a diffuser design with a divergent angle for NMPV studies. Different from previous studies, we apply a convergent-divergent (C-D) nozzle with convergent half angle θ1 and divergent half angle θ2 for NMPV design in this study. By using the dipole value (Dip) of current C-D nozzle type NMPV as an objective function in “Design of Experiments” (DOE) and “Response Surface Modeling” (RSM) optimization methods, C-D nozzle type NMPV with convergent half angles near θ1 = 46° ∼ 54° and divergent half angles θ2 = 113° ∼ 116° has a maximum peak region for Dip value. It is found that the optimal design with the convergent half angle of θ1 = 60° and the divergent half angle of θ2 = 110°. The operational Reynolds numbers raging from 20 to 30 are suggested for the optimal design and operation condition for the current C-D nozzle type NMPV. It is also verified that the C-D nozzle type NMPV pump design has a better performance than the typical diffuser type NMPV pump design. These findings would be useful to the design and operation for C-D nozzle type NMPV micropump.

Keywords

No-moving-part valveMicropumpOptimal design.
Type
Articles
Information
Journal of Mechanics , Volume 26 , Issue 3 , September 2010 , pp. 259 - 265
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2010

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