Particle Concentration Distribution Control Based on Shear Rate Gradient and Marangoni Convection in Microchannel

4th International Conference on Manufacturing, Material and Metallurgical Engineering

Shen, Jinxin^1 ; Zhang, Xiangjun^1 ; Zhong, Hao^1 ; Cheng, Wenjun^1 ; Li, Yong^1

State Key Laboratory of Tribology, Tsinghua University, Beijing

100084, China^1

关键词: Flow behaviours;    Flow charac-teristics;    Marangoni convection;    Microfluidic chip;    Near-wall layer;    Observation techniques;    Particle concentration distribution;    Particle concentrations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/538/1/012057/pdf
DOI  :  10.1088/1757-899X/538/1/012057

来源: IOP

【 摘 要 】

The application of the microfluidic chip to the immunoassay has many advantages such as high efficiency, low cost, and high integration. It is of great significance to understand the flow characteristics of fluids in microchannel, which can improve the efficiency and accuracy of detection. In this paper, the effects of microchannel structure on the particle concentration distribution in two-phase flow and the flow behaviour of near-wall layer are studied by microfluidic observation technique. Also, a kind of microchannel structure was designed to increase the particle concentration in the front-end of microfluidic.