Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : October 10, 2020 - October 11, 2020
Pages 0037-
We numerically studied thermocapillary convection in a rectangular free liquid film and investigated several types of flow patterns as basic steady flows. In a liquid film with a volume ratio of 1.0, which means the liquid film is essentially flat in the absence of convection, a double-layered flow (DLF) occurred even in such a thin liquid film. On the other hand, a smaller volume ratio than the unity resulted in one or more vortex pairs were generated in the plane of the liquid film, called as single-layered flow (SLF). We also found that, even in the SLF, there existed DLF-like vortices on the cold wall. The size and number of vortex cells of SLF depended on the liquid film shape, aspect ratio, and volume ratio. The Nusselt number was obtained to determine its depend on the size and number of cells.
