Athar Zaidi

October 31, 1999 14:59 
Low Reynolds number KOmega modeling
I am having lots of trouble modeling nonNewtonian turbulent flow with LowReynolds number komega model ( Wilcox 1993) , either the values of omega and K decreases to unsual values , something of the order of 10e40 or the solution blows up. I am using CFX 4.2 ( Aea Technology) CFD slover which is a finite volume based solver. It seems to me that nobody has done a simulation of nonNewtonian turbulent blood flow using lowReynolds number model till now. However I get some good results with high Reynolds number RNG Kepsilon model, but I my flow operates at Reynolds number below 10000. Any body has any clue that may be KOmega model has a deficiency in this respect I mean modeling strain rate based viscosity. I couldn`t find such deficiency in literature so far.Please reply soon.
