Numerical simulation of vortex shedding in flow past circular cylinder at Re=100, plotted is the magnitude of the X-velocity component. At the end some passive actuation is imposed on the cylinder boundary, in the end the goal is to attenuate the vortex shedding using this jet.
This is not my video. I found it on the web. Thought it would be interesting to the community. This is a 2d CFD simulation of a supersonic bullet fired down a pipe, made using a special version of VH1 that can simulate flow around rigid objects.The solver is PPM-LR, piecewise-parabolic method (Collela & Woodward), with a Lagrangian remap.