Dear All,

Is there any cfd code for nonnewtonian fluid?

Can we perform CFD computation for nonnewtonian fluid using Fluent, Star-CD, CFX, NUMECA, or PHOENICS ?

Thank you a million!

Jean

Certainly Fluent and CFX allow the user to specify the viscosity as a function of solution variables, such as velocities, velocity gradients, strain rates, temperature, etc.

I haven't used the others but can't imagine them being "general purpose" or "commercial" without the capability you seek.

My research focuses on Non-Newtonian flow (viscoelastic flows), and I find that almost all researchers in my area develop code ourselves.

Re: I think that most packages assume Newtonian theory: linearity of stress-strain relations. They do allow viscosity to vary as a function of some other variables, but are inherently Newtonian.

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Certainly Fluent and CFX allow the user to specify the viscosity as a function of solution variables, such as velocities, velocity gradients, strain rates, temperature, etc.

I haven't used the others but can't imagine them being "general purpose" or "commercial" without the capability you seek.

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any "general purpose" code (fluent, cfx, star,..) should work with general newtonian fluids (power -law, carreau, ..) try polyflow (ckeck fluent website) for viscoelastic flows

good luck,

george

Polyflow can solve your problem. Check Fluents site

ANSYS provides three viscosity models and a user-programmable subroutine for non-Newtonian fluids.