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Changing a particular sphere radius in a randomPeriPack ensemble

Asked by Vinícius Godim

If I create a simple randomPeriPack set of spheres with

sp = randomPeriPack(.1,(1,1,1))
sp.toSimulation()

I want to then be able to change a particular sphere radius and let the system "attract" into its centroid to recreate a dense packing with the newly sized particles.

I thought this could be simple but I haven't figured it out, thanks for any help!

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Jan Stránský (honzik) said : 		#1

Hello,

> I want to then be able to change a particular sphere radius

for b in O.bodies:
   b.shape.radius = whatever # there is a function also modifying mass, but I cannot find it just now

> let the system "attract" into its centroid to recreate a dense packing with the newly sized particles.

maybe [1]? (never used it myself..). Before using such approach, probably you would need something like
for b in O.bodies:
   b.state.pos = O.cell.wrap(b.state.pos)

cheers
Jan

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

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