Abstract
The mass exchange phenomena between main flow and rectangular dead zone in open channel are investigated numerically by means of the plane 2-D shallow water flow equations. The Froude number dependency on the free surface oscillation and mass exchange rate is pointed out through the examination of the calculated results. It is shown that these characteristics can be explained by the simplified model concerning the movement and location of large vortices along the interface. The effect of dead zone scale and the properties of water depth variation at the interface are also investigated numerically.
