BOUNDARY LAYER EFFECTS ON HYDRAULIC JUMP LOCATION.

Abstract

The rate of displacement of the toe of a hydraulic jump along a channel with respect to change in tailwater elevation is defined as the position sensitivity of the jump. The steady flow downstream of a model sluice gate is analyzed theoretically for the case of a laminar boundary layer developing from the vena contracta and breaking into fully developed turbulent flow. It is shown that the position sensitivity of the jump is dependent upon Froude number, boundary roughness and distance downstream from the gate.