lammps/examples/pour/in.pour.2d

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# Pour 2d granular particles into container
dimension 2
atom_style granular
boundary p fm p
newton off
region reg block 0 100 0 50 -0.5 0.5 units box
create_box 1 reg
neighbor 0.2 bin
neigh_modify delay 0
# IMPORTANT NOTE: these values of stiffness (2000) and timestep (0.001)
# are used in this example file to produce a quick simulation and movie.
# More appropriate values for realistic simulations would be
# k = 2.0e5 and dt = 0.0001, as in bench/in.chute.
pair_style gran/hertzian 2000.0 50.0 0.0 0
timestep 0.001
fix 1 all nve/gran
fix 2 all gravity spherical 90.0 -90.0
fix xwalls all wall/gran xplane 0 100 50 0
fix ywalls all wall/gran yplane 0 NULL 50 0
region slab block 1.0 99.0 30 34.5 -0.5 0.5 units box
fix ins all pour 1000 1 4767548 vol 0.4 10 &
diam 0.5 1.0 region slab
fix 3 all enforce2d
thermo_style granular
thermo 1000
thermo_modify lost ignore
compute_modify thermo_temp dynamic yes
dump id all atom 100 dump.pour
run 25000