NUMERICAL SIMULATION OF SELF-INDUCED THERMOCAPILLARY FLOW FOR NON-UNIFORM EVAPORATING MENISCUS IN CAPILLARY TUBES

摘要：

A computational model was developed to describe self-induced thermocapillary convection for non-uniform evaporating meniscus in vertical capillary tubes, which was filled with ethanol, methanol or water. The diameters of capillary tubes ranged from 100 μm to 1000 μm. The direct numerical simulation using control volume approximation was used to investigate the thermocapillary flow in the liquid phase.Three types of distribution of the heat flux along the liquid-vapor meniscus interface were investigated for various Marangoni numbers, to characterize the flow pattern under conditions close to realistic operating parameters. The simulation shows that the flow pattern depends on the thermal boundary condition on the liquid-vapor meniscus interface and the Marangoni number, but is very insensitive to the buoyancyforce for thermocapillary convection for non-uniform evaporating meniscus in the capillary tube with the radius ro<500μ m.

关键词： Thermocapillary convection meniscus interface evaporation numerical simulation

作者: You-Rong Li Bo Lan Lan Peng Ying-Jie Liu

作者单位: College of Power Engineering, Chongqing University, Chongqing 400044, China

会议类型: 国际会议

会议名称: 2007年微纳系统集成及其商业化应用国际学术会议(2007 International Conference & Exhibition on Integration and Commercialization of Micro and Nano-Systems)

会议地点: 海南三亚

会议语种:英文

在线出版日期: 2007-01-10（万方平台首次上网日期，不代表论文的发表时间）