July 26, 2019 at 8:48 pmAntangSubscriber
So I'm trying to model an ejector but I cannot seem to get a structured mesh in the region between the ejector (so between the two airfoil-like surfaces) mainly because the nose is basically a semicircle. I've gotten it to look "decent" with a face sizing but I cannot control its first layer height because it is not a structured mesh. Does anyone know how I can get this to be structured and with appropriate y+ value (<1). Also if I left it how it is (with appropriate height on outer surface and not appropriate on inner surface), is it safe to say the result from the k-w SST results are bad even if I'm getting okay convergence? Would it be more accurate with k-e wall function?
July 27, 2019 at 11:18 ampeteroznewmanSubscriber
If you offset the boundary of each "airfoil" an imprint that onto the fluid region so you have a "ring" around the boundary, you might succeed in getting an inflation layer to go all around the airfoil boundary.
July 29, 2019 at 1:28 pmRobAnsys Employee
I'd also look at mesh growth rate and aspect ratio: just because the cells are good quality doesn't mean the mesh is OK.
As an aside, if this is an ejector, is it a 2d planar or would 2d axi-symmetric be more appropriate?
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