ViscoEl contact normal stiffness kn in the source file is not consistent with that in the documentation
Hello,
I am trying to use the visco-elastic model to do the simulation. I checked the kn calculation in the source file and that in the documentation, then I found that there is a factor 2 difference.
In the documentation, the stiffness is kn=2*kn1*
https:/
However, in the source file, the Kn is calculated by kn= kn1*kn2/(kn1+kn2), as shown in source file line 279 and 315-323:
https:/
279: phys->kn = contactParamete
315: Real contactParamete
316: {
317: // If one of paramaters > 0. we DO NOT return 0
318: Real a = (l1 ? 1 / l1 : 0) + (l2 ? 1 / l2 : 0);
319: if (a)
320: return 1 / a;
321: else
322: return 0;
323: }
Why they are different?
I know in the DEM configuration, Fn=kn1*
Would you please help me? Thank you!
Kind Rrgards,
Yuxuan Wen
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- Jérôme Duriez
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