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general stress-strain relation for fluid

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Is it possible to define a general stress-strain relation for non-Newtonian laminar flow? Laminar flow seems to require you to define a dynamic viscosity. However I am trying to implement a flow law with a complicated stress-strain relation that does not yield a simple analytical equation for viscosity (see attached). Is it possible to define fluid properties more generally (other than externally solving for viscosity as a function of strain rate and then inputting an interpolation function for the viscosity)?



1 Reply Last Post 22 nov 2019, 13:21 GMT-5
David Kan COMSOL Employee

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Posted: 5 years ago 22 nov 2019, 13:21 GMT-5
Updated: 5 years ago 22 nov 2019, 08:21 GMT-5

Hi Claire,

Thanks for posting. This sort of discussion is better for the COMSOL Support portal. Just go to www.comsol.com/support and submit a new case. You can have an in-depth technical discussion there.

Hi Claire, Thanks for posting. This sort of discussion is better for the COMSOL Support portal. Just go to www.comsol.com/support and submit a new case. You can have an in-depth technical discussion there.

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.