lammps/examples/pour/in.pour

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# Pour granular particles into chute container, then induce flow
atom_style granular
boundary p p fm
newton off
region reg block -10 10 -10 10 -0.5 16 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/history 2000.0 50.0 0.50 0
timestep 0.001
fix 1 all nve/gran
fix 2 all gravity spherical 0.0 -180.0
fix zlower all wall/gran zplane 0.0 2000.0 50.0 0.5
region slab block -9.0 9.0 -9.0 9.0 10.0 15.0 units box
fix ins all insert 3000 1 300719 vol 0.13 50 region slab
thermo_style granular
thermo 1000
thermo_modify lost ignore
dump id all atom 125 dump.pour
run 25000
unfix ins
fix 2 all gravity chute 26.0
run 25000