Numerical simulation of multiphase reactive boundary layer flow by mass split technique

A model of multiphase reactive boundary layer flow induced by a shock is presented. Because of the particle reaction in the boundary layer, the source terms are involved in the governing equations. The mass split technique is developed to deal with the problem. Based on the view of mass conservation, the concepts of extrinsic gas density and intrinsic gas density are defined and the mass equation can be split into the extrinsic mass equation and intrinsic mass equation. According to the intrinsic mass equation, a stream function can be introduced so that the similarity transformation can be implemented. By the above split technique, an extrinsic equation is added to the sets of equations, and solving the equations becomes possible. The BOX method is employed to solve the gas phase equations. The particle phase equations are solved by the fourth-order Runge–Kutta method. In order to give a coupling of the gas phase and the solid phase equations, the particle-source-in-cell (PSIC) method is modified to matc...