Comparison of the Two-phase Flow Models for Turbid Density Current

As an especial form of sediment-laden flow, turbid density current can be simulated by two-phase flow models usually including Eulerian multiphase model and mixture model.Because a full Eulerian multiphase model may not be feasible for its complexity, a simplified Eulerian multiphase model, in which the interface force only includes the friction, is applied.Here, the simplified Eulerian multiphase model (i.e.Euler Model) and the mixture model whose relative speed of phases is based on the algebraic slip model (i.e.MASM) were applied to simulate 2-D turbid density current in a channel.It was found that both of them could simulate the current fairly accurately.However, the heights of the heads obtained were different.The following behavior of particles was over stressed in Euler Model while MASM, in which the diffusion of particles was considered, was closer to the actual situation.Therefore, MASM was more suitable for the numerical simulation of turbid density current.