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how to detect particles inside contact radius?

Hello

I am trying to use Hertz-Mindlin API to implement screening distance. But unfortunately I am able to activate the API only when physical contact happens.

Can you please tell me how to get away from this?

I have selected this in the factory.

and In API

If I activate line 205 and 206 it does not get activated when there is contact overlap (in the absence of physical overlap)

please tell me if I'm doing anything wrong

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EDEM

English

v2022.3

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Stephen Cole

Hi Shyam,

The code looks OK to me. Do you definitely have particles with contact radii set in the simulation? Have you tried debugging to see what happens when you hit that IF statement.

Regards

Stephen

satri

Hello Stephen

Yes I am positive I have the particles inside contact radius. Not sure why it's still not detecting it. Even in debug mode the contact model only gets activated when the particles come in physical contact.

satri

Never mind this was my confusion

I was under the impression that

The condition on line 203 is for actual physical overlap.

Your terminology on EDEM is confusing; as a user, I would think

contact.normalPhysicalOverlap <= 0.0 -> This is a condition for when the particles physically overlap

and

contact.normalContactOverlap >= 0.0 -> this is the condition when the contact radius overlaps

but its the other way around

contact.normalPhysicalOverlap <= 0.0 -> This is a condition for when the contact radius overlap

contact.normalContactOverlap >= 0.0 -> this is the condition when the physical radius of the particles overlaps

I can stop the program when the contact radius starts overlapping

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