Dear Sirs,
I can't set z-plane walls to wiggle in LIGGGHTS using fix/wall/gran.
When I use walls from a CAD file (mesh/gran) then wiggle works fine.
Please see the attached in.packing_wiggle file, which is nothing but the in.packing file from the EXAMPLES of LIGGGHTS with some small modifications, i.e. I just added gravity in z direction, changed the position of the z walls and made them wiggle by an amplitude of 1. And although it should cause an oscillation with a huge amplitude - if I did everything correctly - I don't see (?) the expected change due to the wiggle.
Am I doing something wrong in the in.file? Or maybe there is really a bug with the wiggle function (which I consider as improbable)?
Thanks so much in advance for any hints to solve this problem!
Eric
P.S. Oh, and the wiggle of LAMMPS also works fine here :) The problem I am encountering refers only to using wiggle in LIGGGHTS.
| Attachment | Size |
|---|---|
 in.packing_wiggle.txt | 2.8 KB |
cstoltz | Thu, 07/12/2012 - 13:39
Eric, I ran a copy of your
Eric,
I ran a copy of your input deck using version 1.5.3 and it worked fine. The particles are showing the oscillation. Not sure why it isn't working at your end.
Chris
ericparteli | Thu, 07/12/2012 - 14:22
Hi, Chris, thanks so much for
Hi, Chris,
thanks so much for your time. Yes, you are totally right, indeed I just ran liggghts-1.5.3 and the in. file works fine.
I obviously made an incredible mistake and I will just check!
Best
Eric
ckloss | Thu, 07/12/2012 - 14:43
The wiggle option for
The wiggle option for primitive walls was removed in 2.X (shear is still possible) but this did not find it's way into the doc and error check
I'll add an error check and update the doc accordingly
Note that you can do wiggle (and much more) with fix move/mesh
Regards,
Christoph