Two approaches are proposed to simulate tsunamis generated by granular landslides: a depth-averaged model, AVALANCHE, and laminar Navier–Stokes simulations using the OpenFOAM model. Both models validated against two 2D benchmarks, subaerial submerged one involving triangle initial slide shape. In both models, landslide is defined as viscous fluid flowing downslope. Except in first instants, can...