particle contact detaction

kunzhang's picture
Submitted by kunzhang on Wed, 04/09/2014 - 00:40

Hi All,

I would like to implement the liquid bridge model (Deliang Shi 2008) to the LIGGGHTS and study the liquid transfer between particles. The general algorithm is that

If two particles are contacted to each other at previous step, and these two particle move apart at current step, then the liquid is transfered.

Could anyone give me some hint on how to check if two particles are contacted to each other at previous step? Or If you happens to work on the liquid bridge model also, we might discuss that.

Thanks!

Kun

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ckloss's picture

ckloss | Wed, 04/30/2014 - 11:55

Hi Ku,

what you are looking for is the "touch" bitfield in the contact models

Best wishes
Christoph

Schrader | Mon, 03/20/2017 - 11:52

Hello,
I'm trying to modify the Hertz contact model and I also want know if the two particles were in contact in a time step before. I have searched for the keyword "touch" in the source files, but I could not find these bitfield anymore. Is it possible that there are some changes over the different versions of LIGGGHTS or is there another way to identify the contact history?

Best regards,
Marcel