Assessment of three hybrid-upwind methods in unsteady shock-wave diffraction over a cylinder is presented. The study includes two hybrid Flux Vector Splitting (FVS) methods and a hybrid Riemann solver. The hybrid FVS schemes are constructed by a combination of flux vector splitting and second-order artificial dissipation. The hybrid FVS-Riemann solver is constructed by the combination of a characteristic flux averaging method and a FVS scheme. The above schemes are implemented in conjunction with an implicit unfactored method. Computations are performed for unsteady shock diffraction over a cylinder and comparisons are presented with other numerical and experimental results from literature, including recent unstructured adaptive-grid computations. Emphasis is given on the accurate prediction of the unsteady pressure loads on the cylinder surface since this is of interest in engineering applications related to explosions and fluid-structure interaction.
|Number of pages||21|
|Journal||Computer Methods in Applied Mechanics and Engineering|
|Publication status||Published - 25 Aug 1998|