in.pour
# Custom pour example
variable name string pour
atom_style sphere
boundary p p fm
newton off
comm_modify vel yes
lattice fcc .8
region reg block -35 35 -3 3 0 70
create_box 4 reg
neighbor 0.2 bin
neigh_modify delay 0
pair_style hybrid lj/cut 2.5 gran/hooke/history 2000.0 NULL 50.0 NULL 0.5 0
pair_coeff * * lj/cut 1 1 2.5
pair_coeff 1 1 gran/hooke/history
timestep 0.001
region P1 block -9 -8 -1.5 1.5 60 66
region P2 block -9 -6 -1.5 1.5 65 66
region P3 block -7 -6 -1.5 1.5 63 66
region P4 block -9 -6 -1.5 1.5 63 64
region P union 4 P1 P2 P3 P4
region O1 block -4 -3 -1.5 1.5 60 66
region O2 block -4 -1 -1.5 1.5 65 66
region O3 block -2 -1 -1.5 1.5 60 66
region O4 block -4 -1 -1.5 1.5 60 61
region O union 4 O1 O2 O3 O4
region U1 block 1 2 -1.5 1.5 60 66
region U2 block 1 4 -1.5 1.5 60 61
region U3 block 3 4 -1.5 1.5 60 66
region U union 3 U1 U2 U3
region R1 block 6 7 -1.5 1.5 60 66
region R2 block 6 9 -1.5 1.5 65 66
region R3 block 8 9 -1.5 1.5 63 66
region R4 block 6 9 -1.5 1.5 63 64
region R5 prism 8 9 -1.5 1.5 60 63 0 -.75 0
region R union 5 R1 R2 R3 R4 R5
region POUR union 4 P O U R
group POUR region POUR
create_atoms 2 region POUR
fix 1 all nve/sphere
fix 2 all gravity 1.0 spherical 0.0 -180.0
fix zlower all wall/gran hooke/history 2000.0 NULL 50.0 NULL 0.5 0 &
zplane 0.0 2000.0
#fix 3 POUR nve/noforce
#fix 4 POUR setforce 0.0 0.0 0.0
region slab block -3 3 -2 2 69.5 70
fix ins all pour 40000 1 300719 vol 0.5 100 region slab
region slab2 block -16 -15 -2 2 69.5 70
fix ins2 all pour 10000 3 300719 vol 0.5 100 region slab2
region slab3 block 15 16 -2 2 69.5 70
fix ins3 all pour 10000 4 300719 vol 0.5 100 region slab3
compute 1 all erotate/sphere
thermo_style custom step atoms ke c_1 vol
thermo 1000
thermo_modify lost ignore norm no
compute_modify thermo_temp dynamic yes
dump 1 all custom 250 dump.${name}.* id type x y z vx vy vz
run 1000000
# Original LAMMPS pour example script
# Pour granular particles into chute container, then induce flow
atom_style sphere
boundary p p fm
newton off
comm_modify vel yes
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/hooke/history 2000.0 NULL 50.0 NULL 0.5 0
pair_coeff * *
timestep 0.001
fix 1 all nve/sphere
fix 2 all gravity 1.0 spherical 0.0 -180.0
fix zlower all wall/gran hooke/history 2000.0 NULL 50.0 NULL 0.5 0 &
zplane 0.0 2000.0
region slab block -9.0 9.0 -9.0 9.0 10.0 15.0 units box
fix ins all pour 3000 1 300719 vol 0.13 50 region slab
compute 1 all erotate/sphere
thermo_style custom step atoms ke c_1 vol
thermo 1000
thermo_modify lost ignore norm no
compute_modify thermo_temp dynamic/dof yes
#dump id all atom 1000 dump.pour
#dump 2 all image 1000 image.*.jpg type type &
# axes yes 0.8 0.02 view 80 -30
#dump_modify 2 pad 5
#dump 3 all movie 1000 movie.mpg type type &
# axes yes 0.8 0.02 view 80 -30
#dump_modify 3 pad 5
run 25000
unfix ins
fix 2 all gravity 1.0 chute 26.0
run 25000
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