Author(s)

A. Ahmadi & J. D. Hardwick

Abstract

The velocity profile of the air layer above a planar water jet is investigated theoretically and experimentally. For a water jet diverted toward an inclined solid wall with zero air detainment, it is shown that a power-law profile with an exponent of 1/7 predicts the thickness of the air layer satisfactorily. Predictions of total air entrainment for a water jet over a nappe deflector using a power-law and the law-of-the wall are found to be in good agreement with experimental results. The reasons for discrepancies between theory and experiments are proposed.

Keywords