Streamlines Past Sources and Vortices

Drag any of the singularities from the well on the right into the main computation area.
Set the freestream speed (the flow is from left to right), then click Compute.
The marks on the page simulate small tufts and indicate the direction of the local flow. Experiment with multiple singularities to simulate a pair of wing trailing vortices, a source/sink doublet, or a spinning baseball.