通过热毛细效应和热膨胀效应之间的竞争改变接触线动力学
Alteration in contact line dynamics through competition between thermocapillary and electrothermal effects
摘要：
本文研究了热流体窄通道中两种不混溶流体的热场辅助流动构型的接触线动力学。通道表面以预先设计的润湿性润湿，并将叉指电极安装在基底上以产生不均匀的电场。在这项研究中，相互作用的热毛细作用和摩擦力的界面动力学进行了详细的研究。前者是由表面张力梯度引起的，而后者是由介电常数和电导率梯度引起的。我们的研究表明，相对强度的界面力和摩擦力和它们的相互作用可以有效地用于控制毛细管填充时间以及流动动力学。对于相同强度的热毛细力和热毛细力（由单独的无量纲数表征），热毛细力占主导地位。然而，在某些润湿性下，界面力支配着润湿力，并使流体运动朝向通道的入口。
英文摘要：
The contact line dynamics of a thermal field assisted flow configuration of two immiscible fluids is considered in a narrow thermofluidic pathway. The surfaces of the channel are wetted with predesigned wettabilities and interdigitated electrodes are mounted on the substrates to generate non-uniform electric field. In this study, the interplay of thermocapillary and electrothermal forces on interfacial dynamics are studied in detail. The former is caused by surface tension gradients while the latter results from gradients in permittivity and electrical conductivity. Our investigations reveal that the relative strength of interfacial forces and electrothermal forces and their interactions can be effectively used to control the capillary filling time as well as the flow dynamics. For same strength of thermocapillary and electrothermal forces (characterized by individual dimensionless numbers) electrothermal forces dominate over thermocapillary forces. However, interfacial forces at some wettabilities dominate over electrothermal forces and set the fluid motion toward the entry of the channel.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
