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Modeling viscosity. Shear strain=Shear rate?

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Old   February 17, 2016, 12:57
Default Modeling viscosity. Shear strain=Shear rate?
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Jordi Pina
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Hello,

I'm developing a UDF for introducing the Cross-WLF viscosity model.

In the Cross-WLF model there's the shear rate variable (see the image).



In the UDF I am using the following code for defining the shear rate:

real shear_rate=C_STRAIN_RATE_MAG(cell,thread);

My doubt is:

Is the strain rate the same as the shear rate?

In case of no, how should I obtain the shear_rate value from ANSYS in the UDF?
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Old   February 18, 2016, 07:48
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Somebody needs extra information?
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Old   February 21, 2016, 15:14
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Please, does somebody know if shear strain is the same of shear rate?

And, if not, how do I obtain "shear rate" in a UDF?
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