[lammps-users] Can LAMMPS simulate triaxial tests at the granular level?

Hi

I am going to start a new project on sand control and am curious if LAMMPS could give me a nice portal to do everything I need to do. Hence I need to know a few things before I start using the package.

I need to know if there is a way to simulate stresses on the walls of a box containing granular particles in LAMMPS?

I need to know if I can make a circular cavity in one of the walls of the sample?

I need to know if there is a feature to incorporate fluid flow through a porous granular sample?

Ripudaman Manchanda
Geomechanics Intern
Schlumberger DCS
1325 S. Dairy Ashford

Houston, TX 77077

I need to know if there is a way to simulate stresses on the walls of a box
containing granular particles in LAMMPS?

Not sure what you mean by "simulate" - you can look at the
fix wall/gran command to see if it is what you want.

I need to know if I can make a circular cavity in one of the walls of the
sample?

If your "wall" is made of particles, to be a "rough" wall, then you
could build it however you want and just input it as atoms in a
data file.

I need to know if there is a feature to incorporate fluid flow through a
porous granular sample?

Standard LAMMPS does not do this, but various people
have coupled LAMMPS to fluid or other continuum solvers. That
is an open and big field. You might talk to Jeremy Lechman (jblechm
at sandia.gov)
who has done a lot with granular and fluids. Also Chris Stoltz is
using LAMMPS and other packages for granular systems, so he might
comment on your questions/issues (stoltz.c at pg.com).

Steve

Thank you so much for answering my questions.

My doubt regarding the wall was if I could apply a finite stress on the
wall. But your answer to the circular cavity question answered this query of
mine... Generating a wall of particles would be a good approximation for my
case.

Thank you for your help.

Ripudaman