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August 13, 2013, 08:31 |
Re=5 Mio. Still steady?
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Member
Shenren Xu
Join Date: Jan 2011
Location: London, U.K.
Posts: 67
Rep Power: 15 |
In this validation example provided by NASA, that runs SA turbulence
model RANS on zero pressure gradient flat plate, http://turbmodels.larc.nasa.gov/flatplate_sa.html how come the RANS solver can still converge to steady state solution when Re is around 5 million? If even (much) finer mesh is used, i.e., DNS, I suppose one shall pick up the unsteadiness. The question is, how fine the mesh needs to be in order to NOT converge to steady state? Is it possible to predict this critical mesh density a priori? Cheers, Shenren |
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