A two fluids computational fluid dynamics (CFD）model was developed to describe the hydrodynamics of liquid-solid slurry flow in horizontal pipeline based on the kinetic theory of granular flow.Researches have revealed that interphase force is closely related to interphase momentum transfer and affects the accuracy of the model.In a fully developed turbulent flow region

drag force and turbulent dispersion force directly affect interphase momentum transfer between solid and liquid

and by introducing such forces the particle concentration simulation tends to be reasonable.The two fluids CFD model based on the kinetic theory of granular flow prevails over current models for various particle concentrations in engineering field.