Abstract: Analytical solutions for free‐surface swirling flows in a vertical dropshaft are presented. The swirling flows are governed by the circulation number and the Froude number. Two types of flow problems are analyzed. The ...

Abstract: The necessary condition for, and the process of, evolution of a coarse layer over finer sediment underneath are presented. Flow regions for pavement and armor formation are identified. A new definition for armor and pavement ...

Abstract: It is postulated that movable sediment beds comprise of two types of grains, termed

Abstract: An analysis to predict the hydraulic performance of a tangential vortex‐inlet which is relatively simple in shape and compact in size is presented. The theory agrees with the experimental data. A relation to determine the ...

Abstract: Water‐surface profiles in a channel that includes either a contraction in channel width, or a rise in channel bottom are analyzed using the specific‐energy concept. It is discovered that the water‐surface profiles in this ...

Abstract: The effect of swirl on air transport in a vertical drop shaft is described. Laboratory experiments on a vortex‐flow drop shaft showed that most of the air is entrained in the annular hydraulic jump that is formed when the ...