Spinning cylinder in potential flow

Here is a simple potential flow system ( http://en.wikipedia.org/wiki/Potential_flow ). The flow comes in
from the left at infinity, and the cylinder (large black object) is rotating counter-clockwise. The tracers are
initially evenly distributed in the fluid; you can see how the system evolves as predicted by the LCS (forward LCS in red, reverse LCS in blue).

See http://www.its.caltech.edu/~raymondj/LCS/ for more information.

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