多物理
纳米流体
马朗戈尼效应
材料科学
机械
涡流
流量(数学)
传热
光学
物理
有限元法
热力学
对流
作者
Zhe Liu,Zexiong Yu,Leilei Wang,Li Chen,Haihang Cui,Bohua Sun
出处
期刊:International Journal of Numerical Methods for Heat & Fluid Flow
[Emerald (MCB UP)]
日期:2022-09-07
卷期号:33 (2): 712-727
被引量:1
标识
DOI:10.1108/hff-05-2022-0269
摘要
Purpose The purpose of this study is to use a weak light source with spatial distribution to realize light-driven fluid by adding high-absorbing nanoparticles to the droplets, thereby replacing a highly focused strong linear light source acting on pure droplets. Design/methodology/approach First, Fe 3 O 4 nanoparticles with high light response characteristics were added to the droplets to prepare nanofluid droplets, and through the Gaussian light-driven flow experiment, the Marangoni effect inside a nanofluid droplet was studied, which can produce the surface tension gradient on the air/liquid interface and induce the vortex motion inside a droplet. Then, the numerical simulation method of multiphysics field coupling was used to study the effects of droplet height and Gaussian light distribution on the flow characteristics inside a droplet. Findings Nanoparticles can significantly enhance the light absorption, so that the Gaussian light is enough to drive the flow, and the formation of vortex can be regulated by light distribution. The multiphysics field coupling model can accurately describe this problem. Originality/value This study is helpful to understand the flow behavior and heat transfer phenomenon in optical microfluidic systems, and provides a feasible way to construct the rapid flow inside a tiny droplet by light.
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