CHARACTERISTIC-BASED PRESSURE CORRECTION AT ALL SPEEDS

A new characteristic-based pressure-correction method designed for com putation of flows at all speeds Is presented. The method includes the implementation within the pressure correction framework of interpolati on of the characteristic variables, the approximation of the nonlinear operator by a stable segregate linear operator, the use of an approxi mate Riemann solver for the computation of the cell face inviscid Aux, and the projection of the correction fields into the flux space, Appl ication test cases include 1) supersonic inviscid are bump how 2) tran sonic viscous double throat nozzle, and 3) incompressible lid driven c avity flow, The method is uniformly of high order and nonoscillatory, which leads to crisp shock representation without the creation of spur ious oscillations. The results show a substantial improvement over exi sting pressure-correction methods for computation of compressible flow s.