不同壁温驱动液滴Marangoni迁移的直接数值模拟
鲍允州;张莹
【期刊名称】《南昌大学学报（工科版）》 【年(卷),期】2024(040)002
【摘要】In order to study the hydrodynamics principle of precise control of microdroplets,Front Tracking Method(FTM)was used to simulate the Marangoni migration caused by the temperature gradient in the fluid do-main where the square domains were at high temperature and the four walls at different low temperatures.The results showed that the deformation of the free-floating droplets during the movement was small,and the Marangoni effect drives the droplets move toward the high-temperature region gradually.In the early stage of motion,the area of high temperature was at center of the domain so that the droplets move toward the center firstly.Due to the disturbance of heat transfer by the droplet,the last resting position of the droplet was not in the center of the field.If the tempera-ture of the surrounding walls was different,the droplets move toward the center of the domain firstly,and after sever-al reciprocations,they move toward the higher-temperature wall.It can be seen that the reasonable control of the boundary temperature can achieve the purpose of controlling the microdroplet migration precisely.%为了研究利用温度对微液滴进行精确控制的流体动力学原理,使用Front Tracking Method(FTM)方法模拟方形域处于高温,4个壁面为
不同低温时,流体域中的温度梯度对它当中液滴产生的Marangoni迁移现象.结果表明:自由浮动的液滴在运动过程中的变形比较小,Marangoni效应驱使液滴逐渐向高温区域移动.运动初期高温区域在计算域中心,因此液滴先向中心运动.由于液滴对传热的扰动,使得液滴最后静止的位置不在计算域的中心.如果周围壁面的温度不相同,液滴首先会朝向计算域中心运动,在几次往复运动后,会朝向温度较高的壁面方向运动.可见合理控制边界温度可以达到精确控制微液滴迁移的目的.
【总页数】7页(163-169)
【关键词】Front Tracking Method方法;Marangoni对流;表面张力;数值模拟;流体动力学
【作者】鲍允州;张莹
【作者单位】南昌大学机电工程学院,江西南昌330031;南昌大学机电工程学院,江西南昌330031 【正文语种】中文 【中图分类】TQ02 【文献来源】
https://www.zhangqiaokeyan.com/academic-journal-cn_journal-nanchang-university-engineering-technology_thesis/020129979858.html 【相关文献】
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不同壁温驱动液滴Marangoni迁移的直接数值模拟
