Three-dimensional flow field simulation of steady flow in the serrated diffusers and nozzles of valveless micro-pumps  

作　　者：Ying-hua Xu Wei-ping Yan Kai-rong Qin Tun Cao 

机构地区：[1]School of Energy and Power Engineering,Dalian University of Technology,Dalian 116024,China [2]School of Optoelectronic Engineering and Instrumentation Science,Dalian University of Technology,Dalian 116024,China

出　　处：《Journal of Hydrodynamics》2019年第2期413-420,共8页水动力学研究与进展B辑（英文版）

基　　金：the National Natural Science Foundation of China(Grant Nos.61376115,11672065).

摘　　要：This paper presents a three-dimensional flow field simulation of the steady flows through diffusers and nozzles with straight or serrated-sided walls to analyze the effect of the channel structure on the flow characteristics.The pressure and velocity profiles in the diffusers and the nozzles as well as the net volumetric flow rate are determined.Our simulation demonstrates that the pressure and velocity profiles in the serrated diffuser/nozzles are more complicated than those with the straight-sided wall,while the net steady flow rate with the straight-sided wall increases monotonically with the increase of the pressure difference,the steady flow rate with serrated sided walls increases gradually to reach a maximum and then decreases with the increase of the pressure difference.The results suggest that the number of the sawteeth plays a significant role in optimizing the design of serrated diffusers and nozzles for improving the transport efficiency of valveless micro-pumps.

关 键 词：Valveless micro-pump STEADY FLOW DIFFUSER and NOZZLE serrated-sided wall THREE-DIMENSIONAL FLOW field simulation 

分 类 号：O3[理学—力学]