Hi everybody,
In the new version of liggghts I can not create a cylindrical wall with fix wall/gran/hertz/history. I am using this code to specify the cylwall:
fix cylwalls all wall/gran/hertz/history primitive type 1 zcylinder 0.1 0. 0.7
Is there any error in this line?
Regards,
David
cstoltz | Mon, 10/28/2013 - 11:33
Not that I can see. What
Not that I can see. What sort of errors are you getting?
Regards,
Chris
DAVID RIVERA TAPIA | Mon, 10/28/2013 - 16:23
Trouble with fix wall/gran
I did not get an error, but the cylindrical walls did not stop the particles in the simulation box.
The boundaries are:
region reg block -0.1 0.1 -0.1 0.1 0 0.7 units box
All the particles exceed the limits and quit the simulation box.
Best Regards,
David
cstoltz | Mon, 10/28/2013 - 20:30
Are the particles actually
Are the particles actually penetrating the cylinder walls, or falling out of the bottom of the cylinder in the z-direction? Keep in mind that a primitive cylinder is just an infinitely long horizontal tube with no top/bottom. If you want to add those, you'll need additional primitives.
If the particles are blowing through the walls, most likely a timestep issue.
Regards,
Chris
DAVID RIVERA TAPIA | Mon, 10/28/2013 - 23:32
Top/ bottom
The particles are falling out of the bottom. Do I need to define a z plane in order to avoid the particles to go out the cylinder?
Best regards,
David
cstoltz | Tue, 10/29/2013 - 10:50
Yes. To create a completely
Yes. To create a completely enclosed cylinder using primitives, you need three primitives - the cylinder and two planes to represent the ends. See fix_wall_gran in the documentation.
Regards,
Chris
DAVID RIVERA TAPIA | Wed, 10/30/2013 - 04:34
Thanks,
Hi Chris,
Thank you very much, your answer helped me to solve my trouble.
Best Regards,
David