Implicit LES for Shock/Blunt Body Interaction

The numerical simulation of the three-dimensional flow upwind of a vertical cylinder over a flat plate is achieved with a parallel LES code which is called DNSUTA Version III. The preliminary computational results with a coarse grid find that the flow structure is similar to experimental observations. The bow shock is very clear, and a separation shock is formed ( Λ -structure). Inside the separation region, there is a supersonic zone clearly visible. We also observe a high pressure zone near the cylinder wall, where the separation shock meets the bow shock. We observe high temperatures at the cylinder surface, as detected in experiments. The streamlines show the separation zone and the vortices are clearly outlined. Also, the root vortex is clearly shown at the base of the cylinder. With a finer grid which we plan to use, it will be very likely to observe more details of the structure for shock/cylinder interaction.