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Re: [Question #699462]: Fixed some particles in a periodic cell

To: yade-users@xxxxxxxxxxxxxxxxxxx
From: Jan Stránský <question699462@xxxxxxxxxxxxxxxxxxxxx>
Date: Fri, 12 Nov 2021 13:05:49 -0000
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Question #699462 on Yade changed:
https://answers.launchpad.net/yade/+question/699462

    Status: Open => Answered

Jan Stránský proposed the following answer:
Hello,

state.blockedDOFs blocks DOFs from the effect of forces. However, it
does not prevent position being changed by the periodic cell.

Use
O.cell.homoDeform=0 # [1]
However, this affects all the particles.

If affecting all particles with homoDeform is a problem, then the option
is to modify source code such that particles with blocked DOFs are not
subjected to the position change by the periodic cell.

Cheers
Jan

[1] https://yade-
dem.org/doc/yade.wrapper.html#yade.wrapper.Cell.homoDeform

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