Herschel-Bulkley non-Newtonian viscosity model has term with sign error -- CFD Online Discussion Forums

June 18, 2013, 23:53

sharonyue

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Dongyue Li

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Location: Beijing, China

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Quote:

Originally Posted by pbryant

Assuming that nu0 is not infinity, tao_y and tao0 are not the same but one can be calculated from the other by matching the Newtonian and non-Newtonian forms at the transition point resulting in: tao_y = tao0 - k*(tao0/nu0)^n.

Hi Paul,

This is where I cannot get it, just see the image:

The red line is nu, black one is tao. Is this what you said?

so is there anything wrong with my equation? but my equation is not implemented in openFOAM.

THANKS!

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Tags

herschel-bulkley, non-newtonian, viscosity models

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