This study proposes a numerical simulation method for a jet flow issued into a two-layer density-stratified fluid. The method is based on the Vortex in Cell method, which discretizes the vorticity field into vortex elements and computes the time evolution of the flow by tracing the convection of each vortex element using the Lagrangian approach. The proposed method is applied to simulate a jet flow, which was experimentally investigated in the authors’ prior study, so as to demonstrate the validity of the method. The simulation highlights that the jet behavior relative to the density interface depends on the   jet Reynolds number and that it agrees well with the experimentally visualizedone.

density-stratified fluid, CFD, Vortex in Cell method, jet, mixing.