i am running an external air flow with conjugate heat transfer thru my 3-component model. From what I learned thru Trimech distributor's tech support, SW2016 Flow Sim only allows for 3d solid, 1/4 symmetry modeling of my problem. This limited capability yields 100k+ cell count models & long run times on my desktop 2-processor, 12-core computer with auto-time stepping enabled (on the order of 2e-07s).
You could model a small slice, then set an ideal wall boundary condition (i.e. tangential flow on the walls).
Flow simulation doesn't like much models with faces that are not parallel to global cordinates system, therefore there will be some mesh refinement on angled faces where you slided the model.
Alex