Numerical Simulations on the Effect of the Angle between the Inlet and the Outlet of a Valveless Micropump

• Main Authors: Bo-Wei Chen, 陳柏維
• Other Authors: 張正憲
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/91749142185653478101

碩士 === 國立臺灣大學 === 應用力學研究所 === 100 === This paper used ANSYS software to analyzes efficiency of valveless nozzle/diffuser-based micropump by changing the angle of inlet and outlet. This paper not only compared the flow rate with experiment, but also discussed and analyzed the property of fluid field, including vortex position and vorticity in the chamber of micropump. Unlike the general method in the simulation of micropump, the simulating model in this study is built to be more complete. Not only piezoelectric materials, the structure of micropump, and the flow field are considered here. Also, the braking method is much different from the traditional one. Instead of moving boundary method, the interaction of the electric field, flow field and the structure is considered in this paper. Besides, the simulation results are much better and believable. According to the result of the simulations, we found that when close the angle of inlet and outlet to 52.5o, the flow rate was the best, because the outlet vortex and the inlet vortex approach earlier than other cases, and it causes the stronger interaction, when the fluid comes into chamber from inlet, it will be lead to the outlet soon, compare with other cases, the velocity of fluid is fast, and the distance of the path is short.