A numerical analysis of non-Newtonian fluid flow through a valveless micropump

8TH BSME INTERNATIONAL CONFERENCE ON THERMAL ENGINEERING Pub Date : 2019-07-18 DOI:10.1063/1.5115935

Nirupom Das Dipto, Syed Tafheem Ahmed Anik, A. Hasan

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Abstract

The flow behavior and performance parameters of a diffuser-nozzle element of a valveless micropump have been studied for different peak pressures by numerical analysis. Blood, a non-Newtonian fluid material has been taken as the working fluid of which viscosity is modeled by the Carreau Model. A pulsating pressure imposed at the boundary of the element results in a net flow in the diffuser direction due to the dynamic effect. The variation of performance parameters such as net volume flow rate, rectification capability and diffuser efficiency have been observed for quantitative study. Flow behavior and recirculation region have been studied as qualitative study. A 2-D geometry is considered for the numerical analysis and peak pressure has been varied from 5 to 50 kPa for the present study. Net volume flow, rectification capability and diffuser efficiency are found to increase with the increase of peak pressure. Flow separation and recirculation region are found to last for longer period of time with the increase of peak pressure.The flow behavior and performance parameters of a diffuser-nozzle element of a valveless micropump have been studied for different peak pressures by numerical analysis. Blood, a non-Newtonian fluid material has been taken as the working fluid of which viscosity is modeled by the Carreau Model. A pulsating pressure imposed at the boundary of the element results in a net flow in the diffuser direction due to the dynamic effect. The variation of performance parameters such as net volume flow rate, rectification capability and diffuser efficiency have been observed for quantitative study. Flow behavior and recirculation region have been studied as qualitative study. A 2-D geometry is considered for the numerical analysis and peak pressure has been varied from 5 to 50 kPa for the present study. Net volume flow, rectification capability and diffuser efficiency are found to increase with the increase of peak pressure. Flow separation and recirculation region are found to last for longer period of time with the i...

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非牛顿流体通过无阀微泵的数值分析

通过数值分析，研究了不同峰值压力下无阀微泵扩散喷嘴元件的流动特性和性能参数。将血液作为一种非牛顿流体材料作为工作流体，用卡罗模型对其粘度进行了建模。在元件边界处施加脉动压力，由于动力作用，在扩散器方向产生净流。对净体积流量、整流能力和扩散器效率等性能参数的变化进行了定量研究。对其流动特性和再循环区域进行了定性研究。在数值分析中考虑了二维几何形状，在本研究中，峰值压力从5到50 kPa不等。净体积流量、整流能力和扩散器效率随峰值压力的增大而增大。随着峰值压力的增加，流动分离和再循环区域持续的时间更长。通过数值分析，研究了不同峰值压力下无阀微泵扩散喷嘴元件的流动特性和性能参数。将血液作为一种非牛顿流体材料作为工作流体，用卡罗模型对其粘度进行了建模。在元件边界处施加脉动压力，由于动力作用，在扩散器方向产生净流。对净体积流量、整流能力和扩散器效率等性能参数的变化进行了定量研究。对其流动特性和再循环区域进行了定性研究。在数值分析中考虑了二维几何形状，在本研究中，峰值压力从5到50 kPa不等。净体积流量、整流能力和扩散器效率随峰值压力的增大而增大。流动分离和再循环区域的持续时间较长。

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8TH BSME INTERNATIONAL CONFERENCE ON THERMAL ENGINEERING

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