wall force

Submitted by hansmannb on Wed, 12/04/2013 - 10:49

Hi,

has someone an idea how to fix this problem?

My challenge is it to move a wall/gran/hertz/history (complex geometry) through a region full of particles to compute the resulting force onto the wall.
I need the force for further calculations in MatLab.

Some ideas?

Regards
hansmannb

Forums:

Kashminder | Mon, 04/26/2021 - 20:43

I have a particle in my domain and I have defined a wall at z axis but the particle crosses through the wall and when I try to stop the particle there using fix  zwalls2 all wall/gran model hooke tangential history primitive type 1 zplane 0.00015717827, then it applies a repulsive force and the particle exits from other end. I want that the particle should stop when it collides with the wall. What command should I use?

Kashminder | Wed, 05/05/2021 - 21:22

Thanks for your reply, I am using the gran model hertz tangential history. i don't know if the addforce is too large or there is no repulsive force from the wall.

Kashminder | Tue, 06/01/2021 - 14:49

I am using a If command (if "${b} <= ${bod1}" then "variable bod1 equal v_b") and getting an error (Compute used in variable between runs is not current. Use the update_on_run_end option for computes to avoid this.) I am trying to define update on run. when i try to do that they say illegal variable command. how and where to define update on run in variable defined in if command. I have defined variable like this (variable bod1 equal 1e-5) (variable b equal c_kash[1] ) (compute kash all property/atom z ). Can you please help me editing these commands to get rid of an error.

Thanks
Kashminder