High Resolution of Unsteady Shock Waves around Compression Corners Using Unstructured Adaptive Meshes

Abstract

Numerical simulation, which can be used to examine flow fields quantitatively and in detail, has become very important recently. However, a numerical method which agrees well with the experimental results has not yet been established. This is due to the lack of resolution in complicated flow patterns containing numerous shocks. In the present work, an adaptive refinement/coarsening algorithm is developed and applied to transient shocked flows over single and double wedges. The MUSCL approach for unstructured adaptive meshes is employed to obtain high-order accuracy for spatial discretization and a four-stage Runge-Kutta procedure. The results demonstrate that the adaptive method gives better results than those obtained using structured meshes and it shows good agreement with experiments.