Reply To: Cyclone (Stairmand) simulation using RSM

[Rob]

That all sounds about right. Looking at the two contours you've nicely picked up the vortex core, and also very likely the fact that it's not fixed in place. Look at the "wobble" in the cone section. You may want to refine the mesh a little, but 500k cells should be enough: use contour plots with node values off to assess whether you're picking up the flow gradients.