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Stationary Fluid Dynamic Behaviour of V-Shaped Diffuser/Nozzle Elements for Valveless Micropump |
| ZHAO Quan-Liang;YUAN Jie;LIU Hong-Mei;DUAN Zhong-Xia;ZHANG Wen-Tong;QIU Cheng-Jun;CAO Mao-Sheng |
| School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081 |
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| Cite this article: |
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ZHAO Quan-Liang, YUAN Jie, LIU Hong-Mei et al 2008 Chin. Phys. Lett. 25 1359-1361 |
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Abstract A novel type of V-shaped (isosceles triangle cross-section) diffuser/nozzle element is proposed for use for valveless micropump. Stationary fluid dynamic behaviour of V-shaped diffuser/nozzle elements in a valveless micropump is
investigated by experiment and simulation. Both the results agree well with each other when the Reynolds number is higher than 100 and the pressure loss coefficient ratio of micropump nearly always keeps a constant. For a single V-shaped diffuser, the general trends of variation of pressure loss coefficient with opening angle and Reynolds number are opposite in small and large angles. Compared with conical and flat-wall diffusers, V-shaped diffuser shows the smallest pressure loss when the Reynolds number is 200.
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| Keywords:
47.61.Fg
47.61.-k
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Received: 08 December 2007
Published: 31 March 2008
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| PACS: |
47.61.Fg
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(Flows in micro-electromechanical systems (MEMS) and nano-electromechanical systems (NEMS))
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47.61.-k
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(Micro- and nano- scale flow phenomena)
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