摘要
采用CLSVOF(coupled level set and volume of fluid)方法,以空气和水为介质对矩形截面蛇形微通道内气液两相流动进行模拟研究。验证模型的合理性后,系统地研究了表面张力,液相黏度,壁面接触角及通道截面形状对蛇形微通道内不同流型间转换界限的影响,并绘制了不同表面张力、液相黏度及接触角下的流型图。最后,将计算结果与相同当量直径不同截面微通道内两相流流型图进行对比,分析截面形状及高宽比对流型间转换界限的影响。这些基本规律为微通道的系统设计提供了一定依据。
A numerical analysis of flow patterns in serpentine micro-channels was studied using a CLSVOF(coupled level set and volume of fluid method) multiphase model. The effect of contact angle, surface tension,liquid viscosity and cross section shape on flow pattern was systematically investigated after verifying therationality of the model. The air-water two-phase flow pattern map was drafted under different flow conditions.Moreover, in order to analyze the effect of section shape and aspect ratio on flow pattern, the flow map betweensimulation results and different sections with same equivalent diameter micro-channels was compared. Theseresults provide a basic idea for micro-channel design.
作者
周云龙
常赫
ZHOU Yun-long CHANG He(Energy and Power Engineering College, Northeast Dianli University, Jilin 132012, China)
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2016年第5期1067-1073,共7页
Journal of Chemical Engineering of Chinese Universities
关键词
蛇形微通道
气液两相流
数值模拟
流型
微流体学
serpentine microchannels
gas-liquid flow
numerical simulation
flow pattern
microtluidics