EXPERIMENTAL VISUALIZATION AND “GRANULAR TEMPERATURE”MODEL FOR DENSE GAS-PARTICLE FLOW
Experiments on shock waves interacting with a loose particle bed were conducted in a shock tube.The incident shock velocity and particle diameters were measured by pressure transducers and Malvern particle sizer respectively.The flow fields both in gas and granular phase induced by shock waves were recorded by means of shadow graphs and pulsed X-ray shadow graphs with trace particles.The particle motion was strongly controlled by particle-particle collision which was associated with fluctuation kinetic energy of particle.Based on kinetic theory of granular flow,the conservation and constitutive equations for a dense two-phase flow were derived by introducing “granular temperature”,and then numerical simulations were performed by using ASUM~+ schemes with the advantages of combining the efficiency of Flux-vector splitting and the accuracy of Flux-difference splitting. Measured and calculated results were in good agreement.