Events

When a tsunami arrives a coast, it often breaks offshore and forms a bore. In my talk, I first address a fundamental question, how vorticity (fluid rotation) is generated and leads to the formation of a turbulent flow in a bore (defined as a quasi-steady broken water wave of an infinite wave length) propagating into a quiescent water of a uniform depth. Then, the similar question can be asked for some extended conditions, which includes backwash flow caused by the earlier tsunami runup, for example.