研究期間：10208~10307;From the last two decades until now, the migration of liquid droplet on a horizontal solid surface had been paid widespread attention from many people. It was because these fundamental phenomena could be applied in the fields of engineering, biology, and chemistry. Usually, the applications of droplet migration required effective and accurate control of droplet moving behavior. Therefore, the deep investigations and understandings for the physical mechanisms of droplet migration were needed. The migration of droplet was mainly driven by the variation of the surface tension at the liquid/air and the liquid/solid/air boundary. The surface tension could be changed by various techniques. The most popular method was using temperature filed to generate the surface tension gradient. This was due to the sensitivity of surface tension with a wide range of temperature. In this study, numerical calculations are carried out by solving the Navier-Stokes equation coupled with the energy equation through the finite element method. The conservative level set method, arbitrary Lagrangian Eulerian method, and the continuum surface force method are employed to simulate the physical mechanisms of droplet movement and deformation of the droplet/air interface. The results would combine with the observation of experiment to investigate the influences of the droplet size, slip length and boundary distance on the droplet migration. Then, the three dimension of droplet migration phenomenon is further researched. Through this study, the physical mechanism of droplet migration will be investigated deeply.
