Numerical simulation of highly nonlinear sloshing in a tank due to forced motion

Abstract : FSID stands for free-surface identification. This is the name of a computational code that simulates highly nonlinear 2-D free-surface flow in potential theory. This theoretical framework is shown to be still valid to describe the interaction between two nonmiscible fluids (gas/liquid) in a closed tank, whatever the density ratio. That is why GTT has used FSID for years. This code quickly generates flow conditions before impact, hence providing more sophisticated computational fluid dynamics (CFD) codes with initial flow conditions. The last developments of the code concern the forced motion in three degrees of freedom and two-phase flow modeling. In the present paper the governing equations of the model are presented along with illustrative results.