Multi-Phase Model on Sediment Transport in Sheet-Flow Regime Under Oscillatory Flow

A multi-phase flow model on sediment transport is proposed on the basis of on the kinetic and dynamic mechanism in a sheet-flow regime under oscillatory flow. Empirical formulae on both the interaction force between the fluid and particles and the inter-granular friction force proposed by the authors are introduced in the model. Velocity profiles of both the fluid and particles, the maximum thickness of the moving layer, etc., are examined and reproduced successfully through numerical computation. The multi-phase model established in the present study is found to be suitable for qualitatively analyzing the phenomena of sheet-flow sediment transport.