Abstract
A computational method for two-phase flow with moving boundary is presented, in which the GAL (Grid-Averaged Lagrangian) model is used to track the moving boundary. To avoid numerical instability due to high density ratio between the phases, the motion of each phase is separately treated. The accuracy of the GAL model is examined for the capture of the moving boundary and the curvature of the interface through computation for simple cases of moving boundary problems. The comparison between the computational results obtained by the GAL model and those by the previous models indicates that the GAL model has relatively higher accuracy. The present method is applied to the computations for broken-dam problems and a falling droplet problem, showing that the present method gives good agreements with the previous experimental and computational results.
