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[VG <question293955@xxxxxxxxxxxxxxxxxxxxx>]

Question #293955 on Yade changed:
https://answers.launchpad.net/yade/+question/293955

    Status: Answered => Open

VG is still having a problem:
Hi Jan,

Thanks a lot for your response.

I will study this more and try to figure out how I can set up my
simulation this way. Are there any example scripts which I can look at,
that use this kind of arrangement - i.e. generate the sample in one
simulation and then use that to run the main simulation.

If I understand this procedure correctly, then there might be a problem described as follows:
 if I generate a dense packing using this procedure, aggregates will be closely packed and the particles from different aggregates will come in contact. Then, the automated way of setting cohesive bonds will lead to cohesive bonds between particles of two different aggregates as well. 

In my current setting (in MWE), the aggregates are initially far enough
that there is no cohesive bond formation between particles of different
aggregates when I run it for one step. After running it for one step,
then the aggregates come close together due to application of loading
but no new cohesive bond formation takes place. So I am essentially able
to achieve the setting I want, except that the overall packing is not
dense.

Now, is there a possibility of doing something like:

1. Do the steps I am doing right now in MWE, run it for one step to
establish the desired cohesive bonds. Set the cohesive bond strength
very high initially, so that the cohesive bonds don't break when I run
the PeriIsoCompressor engine in next step.

2. Run the PeriIsoCompressor engine upto the desired stress levels to
obtain dense packing. It will lead to some reduced dimension of the
periodic cell- I am not sure how to get those dimensions.

3. Somehow disable the PeriIsoCompressor engine. Add top and bottom
plates to the scene based on the dimensions of the periodic cell. Reset
the value of the cohesive bond strength to the original and more
realistic value, like how it is being done in the current MWE script.

4. Then run the simulation in a regular way.


I am not sure if these above steps are feasible. Also, due to my limited understanding of how the flow of engines work, I don't know exactly how to set up this procedure.

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