Abstract
The paper deals with turbidity current in settling tank. The flow field is assumed to be twodimensional, steady, isothermal and turbulent. Special attention is paid on the effect of boundary layer growth along the tank bottom on density affected flow.To predict velocity profile and sediment concentration distribution, a mathematical model is presented using k-ε turbulence model. Laboratory experiments are excuted and numerical solutions of the model predict well the results of the experiments. It is demonstrated that the growth of bottom boundary layer promotes vertical mixing of suspended solids and at the same time bottom shear depresses turbidity currents and that the flow patterns are similar to that of ideal tank, near the inlet zone, since the boundary layer thickness is small.
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