You will be able to simulate rotating wind turbines and mixers with the next release of the Caedium CFD software system. Caedium will support Moving Reference Frames (MRF), which is an efficient way to simulate rotating machinery.

Vertical Axis Wind Turbine Lenz2 Caedium CFD SimulationLeft: Stationary, Right: MRF

In addition to using the angular velocity boundary condition (BC) for walls and inlets, in the next Caedium release you will be able to assign the angular velocity BC to a volume. In so doing you will be able to designate that the entire volume rotates around an axis and with a specified angular velocity. This is an extension of the multiple volume system that the current version of Caedium uses to support multiblock meshing.

Vertical Axis Wind Turbine Lenz2 Caedium CFD SimulationVelocity magnitude contours

Vertical Axis Wind Turbine Lenz2 Caedium CFD SimulationVelocity Vectors