PARALLEL LARGE EDDY SIMULATION OF FLOWS WITH COMPLEX GEOMETRY (II)

Large eddy simulation is applied to simulate the turbu-lent flows within rotor-stator cavity. Parallel computation is achieved using the domain decomposition and SPMD model. For the rotor-stator flow, the internal structure is induced by the diffusive transport of the tangential momentum from the rotor into the interior. The instantaneous azimuthal vortic-ity contours near the stator and rotor show stretching and elongated structure in the tangential direction. Near the rotor, the vorticity line is more coherent; however along its counterpart location at the stator wall, the structure is more chaotic. This shows that the turbulence intensity along the stator wall is much more enhanced compared to that on the rotor wall. A laminar region is also identified near the shaft at small radii. Capability of the adopted LES model is also examined by comparing the predicted flow quantities with available measured data