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What is the terminology?

satri

Hello Please tell me the name of each of these variables in the API. The terminology in the API is very ambiguous.

Match the following: A,B,C,D,E,F

Options

contact.normalContactOverlap

element1.physicalRadius

element1.contactRadius

element2.physicalRadius

element2.contactRadius

contact.normalPhysicalOverlap

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EDEM

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v2022.3

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Stephen Cole

Hi Shyam,

contact.normalContactOverlap - D

element1.physicalRadius - A

element1.contactRadius - B

element2.physicalRadius - F

element2.contactRadius - E

contact.normalPhysicalOverlap - C

Regards

Stephen

satri

Cool So you say

contact.normalContactOverlap - D

contact.normalPhysicalOverlap - C

But what happens in EDEM contradicts your statement

Please see this

I use the Hertz Mindlin API to do this

My simulation setup

Particle contact radius definetion

This is when contact overlap starts

When the actual physical overlap happens, it exits the if statement which is correct

but I want to know why is this condition "if (contact.normalPhysicalOverlap <= 0.0)" is being used?

instead of

"if (contact.normalContactOverlap > 0.0)"

Stephen Cole

Cool So you say

contact.normalContactOverlap - D

contact.normalPhysicalOverlap - C

But what happens in EDEM contradicts your statement

Please see this

I use the Hertz Mindlin API to do this

My simulation setup

Particle contact radius definetion

This is when contact overlap starts

When the actual physical overlap happens, it exits the if statement which is correct

but I want to know why is this condition "if (contact.normalPhysicalOverlap <= 0.0)" is being used?

instead of

"if (contact.normalContactOverlap > 0.0)"

Hi Shyam,

"why is this condition "if (contact.normalPhysicalOverlap <= 0.0)" is being used? instead of "if (contact.normalContactOverlap > 0.0)""

The Contact Model model is only called when contact is detected, if there is no contact there is no contact data provided to the API. normalContactOverlap is always going to be greater than 0 , so there is no reason to check for it.

However the particles may not be physically in contact if the contact radius is larger than the physical radius so this condition allows us to check if there is physical contact or not.

Regards

Stephen