EFFECTS OF DYNAMIC INTERACTION ON SEDIMENT-LADEN TURBULENT FLOWS

A systematic approach to explore the effects of dynamic interaction of liquid and solid phases on sediment-laden turbulent open channel flow s is proposed. The investigation is carried out based on systematic an alysis of basic momentum and continuity equations. The effect of suspe nded sediment on the turbulent flow is taken as a perturbation to equi valent turbulent dear water how of the same water depth. A perturbatio n analysis is then developed, in an attempt to quantitatively describe the physical process of the interaction between the turbulent flow an d the suspended sediment. As a result, a generalized suspended sedimen t concentration distribution is derived directly from the momentum equ ation; After conducting an analysis of the generation of the induced R eynolds stress, the mean velocity profile of the perturbed flow is als o obtained. The derived concentration and mean velocity distributions agree well with experimental data. The present analysis improves our u nderstanding of the coupling mechanism, develops a framework, and offe rs new analytical results for further study.