Unified Gas-Kinetic Wave-Particle Methods VI: Disperse Dilute Gas-Particle Multiphase Flow

In this paper, a unified gas-kinetic wave-particle scheme (UGKWP) for the disperse dilute gas-particle multiphase flow is proposed. The gas phase always in hydrodynamic regime. However, particle covers different regimes from trajectory crossing to wave interaction with variation of local Knudsen number. UGKWP an appropriate method capturing multiscale transport mechanism through its coupled formulation. regime intensive collision, evolution solid will be followed by analytic quasi-equilibrium distribution; while rarefied non-equilibrium captured tracking and which plays decisive role recovering behavior. (GKS) employed simulation flow. highly collision particles, no particles sampled formulation reduce system two-fluid Eulerian model. On other hand, collisionless particle, free UGKWP, return Eulerian-Lagrangian particle. tested all regimes, include crossing, concentration under number, dispersion Stokes A experiment shock-induced bed fluidization simulated results are compared experimental measurements. These numerical solutions validate suitability proposed