Disturbed Direct Numerical Simulation Of Gas-Solid Two-Phase Circular Cylinder Wake

A computational study of three-dimensional gas-solid two-phase circular cylinder wake has been performed using direct numerical simulation (DNS). Up to now, studies about three-dimensional gas-solid two-phase circular cylinder wake using DNS are considerably few. Based on thoroughly review and summary in the research status of recent circular cylinder wake and gas-solid two-phase circular cylinder wake, by using three-dimensional direct numerical simulation, the thesis initiated the study of the effect on the pattern of the three-dimensional gas-solid two-phase circular cylinder wake caused by the different flow inflow conditions or different particle inflow conditions. It yielded some creative achievements with important theoretical significance and engineering application value.The solving object is a set of governing equations of a flow field featured being uncompressible. And the one way coupling method is also employed to simulate the behavior of the flow and the dispersion of the particle field under the conditions of all sorts of typical Reynolds numbers and Stokes numbers and the effect on them caused by different inflow conditions. The numerical scheme is based on high accurate finite compact difference method. And the fourth-order compact difference schemes suggested by Lele in his review published in 1992 are applied to discretize the space derivatives, and a low-storage four-order Runge-Kutta scheme suggested by Jameson is used in time marching. In the setting of the boundary condition the Orlanski's Non-reflecting boundary...