Hi, 

This is a DEME-related question. It possible might be helpful to other 
people who use Chrono GPU as well.

I am pretty new to DEM simulations so excuse my ignorance on this topic. I 
have used the DEME solver to obtain the particle contact information file 
that includes information such as interacting particles, forces, and 
contact locations. I have some questions regarding these that I hoped you 
could help me with. 

1- For DEM users, what are some of the most important parameters that can 
be extracted using the particles' contact information?

2- I have done some reading and have found that particle stresses can be 
calculated using the contact information as 1/V*sum(x_i*F_i) where x is the 
contact location and F is the contact force. This is pretty easy to do when 
you have one file. However, since contact files are outputted at every 
frame, I was wondering if there is a program that DEM users use to process 
this data. I realize that ParView is one popular option. I would appreciate 
it if someone had a good example to share.

3- Visualization. what would be the best way to use/combine the contact 
data files with the sphere data files (Outputted using *WriteSphereFile )* to 
better visualize the calculated data? In other words, if I were to process 
the contact information file in ParaView, what is the best way to render 
the results along with the sphere data files? 

Thank you so much for your help in advance, I realize that these might be 
some basic things that DEM users know how to do. However, I have been 
reading a lot about this and could not find very good resources regarding 
these questions. Any good examples with pictures will be so much 
appreciated. Hope this helps other users who are new to DEM modeling as 
well. 

Thank you again, 

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