How to move the servo walls to a specific position?

Submitted by yuxuan on Fri, 06/21/2019 - 02:03

Hello everyone,

Right now I conducting a undrained triaxial test. The top and bottom walls are moving closer to compress the particles by "fix move/mesh" command and then the position of the side walls can be calculated. But I am confused on how to control the position of the side wall. I searched in the forum and found that in the old version of LIGGGHTS, the position of side walls can be controlled by "fix move/mesh/gran variable" command, but now this command doesn't exist anymore. Does anyone know how to control the side walls?

Thank you so much!

Best regards,
Yuxuan