STRUCTURED MOVING GRID AND GEOMETRIC CONSERVATION-LAWS FOR FLUID-FLOWCOMPUTATION

Fluid flow analysis using structured moving boundary fitted grids is p resented. This type of method can be applied to certain moving boundar y problems. The Cartesian velocity components are made the primary var iables, and grid motion and geometric conservation are handled in a na tural way through the contravariant velocities and the Jacobian evalua tions. A SIMPLE-based sequential solver along with a staggered grid is employed. Furthermore, appropriate treatments of the discretized form of the diffusion term on a nonorthogonal skewed grid are also discuss ed. The moving grid approach is applied to simulate test problems invo lving phase change.