Moshman Research used ANSYS Fluent CFD software to model a circular rotor which can generate directional thrust from the air or water around it. This can be used to sail into the wind.
The design requires careful meshing and time-stepping to capture the wake shedding when it occurs. The large parameter space was scanned as a starting point to design a control law. The control takes a measurement of the flow direction and applies the right action to direct force in the desired direction.