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Vol. 151, No. 4, April 2013, pp. 24-29

 

Bullet

 

Fluid Structure Coupling Analysis of Boundary Layer Streaming Driving Micropump
 
1, 2 Changzhi Wei, 1* Shoushui Wei, 1 Feifei Liu

1 School of Control Science and Engineering, Shandong University,
No.17923, Jingshi Road, Jinan, Shandong, P.R.C, 250061, China

2 Shandong Provincial Key Laboratory of Network based Intelligent Computing,
No.106, Jiwei Road, Jinan, Shandong, P.R.C, 250022, China

* Tel.: +86-531-88392827, fax: +86-531-88392827

* E-mail: sswei@sdu.edu.cn

 

Received: 15 March 2013   /Accepted: 18 April 2013   /Published: 30 April 2013

Digital Sensors and Sensor Sysstems

 

Abstract: An acoustic streaming micropump driven by boundary layer streaming is proposed. The streaming velocity is simulated by employing the direct streaming method. When the vibration displacement is 0.1 mm with a driving frequency of 1.0 MHz, an average outlet velocity of 4.87 mm/s can be obtained. Analysis indicates that the average outlet velocity is proportional to the square of the vibration displacement and the driving frequency. When the fluid viscosity is less than 10-4 Pas, the average outlet velocity remains unchanged, otherwise the average outlet velocity decreases with the fluid viscosity increasing. Finally the influence of back pressure on the average outlet velocity is simulated and the maximum back pressure of the designed acoustic streaming micropump achieved is 135 Pa.

 

Keywords: Acoustic streaming, Computational fluid dynamics, Valveless micropump

 

 

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