CFX capability

sharif88 · February 9, 2014, 17:57

I was wondering if it is possible to simulate turbulent flow of non-Newtonian fluids using CFX,
The material is a power law fluid which is a polymer,
The main goals of the simulation is to get the velocity profiles, Reynolds stresses (Pressure drop is also important because it supposes to be a drag reducing flow).
Thanks

ghorrocks · February 10, 2014, 05:23

I have not checked but I suspect it is possible to run a non-Newtonian model with a turbulence model, but the question of whether it is accurate is another issue. There are no turbulence models widely accepted to my knowledge for non-Newtonian flows. So I would be very careful with these models and do thorough validation.

And the situation is the same for all CFD codes - it is current research to apply a turbulence model to non-Newtonian flows, so I doubt you will find anyone can do it easily.

But if you don't care about accuracy and all you want is a turbulence model and a non-Newtonian flow model then, yes, CFX can probably do it.

February 9, 2014, 17:57	CFX capability	#1
sharif88 New Member Majid Join Date: Jan 2014 Location: Canada Posts: 23 Rep Power: 12	I was wondering if it is possible to simulate turbulent flow of non-Newtonian fluids using CFX, The material is a power law fluid which is a polymer, The main goals of the simulation is to get the velocity profiles, Reynolds stresses (Pressure drop is also important because it supposes to be a drag reducing flow). Thanks

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February 10, 2014, 05:23		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,871 Rep Power: 144	I have not checked but I suspect it is possible to run a non-Newtonian model with a turbulence model, but the question of whether it is accurate is another issue. There are no turbulence models widely accepted to my knowledge for non-Newtonian flows. So I would be very careful with these models and do thorough validation. And the situation is the same for all CFD codes - it is current research to apply a turbulence model to non-Newtonian flows, so I doubt you will find anyone can do it easily. But if you don't care about accuracy and all you want is a turbulence model and a non-Newtonian flow model then, yes, CFX can probably do it.