ABSTRACT
A model for the propagation of a rigid boundary gravity current is presented that allows an approximate front condition to be deduced. The model is founded on the assumption that the reduction in speed relative to a slip boundary current is due to the elevation of the stagnation point at the nose and the upstream stagnation streamline. Experimental data is presented that provide estimates for these parameters and using these estimates the model predicts Froude numbers consistent with a range of experimental data.
