HEC-RAS 2D is an integrated part of the HEC-RAS model, which allows to simulate 2D flow simulation or 1D/2D coupled flow simulation. In this tutorial, a 2D unsteady model has been developed using HEC-RAS 2D model.
Youtube Videos:
HEC-RAS: Lec 7 Hands-on-Training for HEC RAS 2D Model - YouTube