Hydraulic characteristics of flow over dam and hydraulic jump of Bingham fluid

In this paper, the experiments of varied flow in a rectangular open channel were carried out using the mixtures of water and bentonite which were regarded as the Bingham fluid and the manner in which the flow over a dam and the hydraulic jump were varied by concentration of the mixtures. As a result, it was shown that experimental results to mixtures with volumetric concentration less than 2.6% (yield stress τfplf>1.2 Pa, ηpl>46 mPa·s), the critical depth increased dramatically, and about 10% of the critical depth was the depth of plug flow at concentration 4.0% (τf = 19 Pa, ηpl = 364 mPa·s).