126 lines
5.3 KiB
Groff
126 lines
5.3 KiB
Groff
LAMMPS (8 Feb 2023)
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OMP_NUM_THREADS environment is not set. Defaulting to 1 thread. (src/comm.cpp:98)
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using 1 OpenMP thread(s) per MPI task
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# Pour 2d granular particles into container
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dimension 2
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atom_style sphere
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boundary f fm p
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newton off
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comm_modify vel yes
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region reg block 0 100 0 50 -0.5 0.5 units box
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create_box 1 reg
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Created orthogonal box = (0 0 -0.5) to (100 50 0.5)
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4 by 1 by 1 MPI processor grid
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neighbor 0.2 bin
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neigh_modify delay 0
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# IMPORTANT NOTE: these values of stiffness (4000) and timestep (0.001)
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# are used in this example file to produce a quick simulation and movie.
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# More appropriate values for realistic simulations would be
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# k = 4.0e5 and dt = 0.0001, as in bench/in.chute (if it were Hertzian).
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pair_style gran/hertz/history 4000.0 NULL 100.0 NULL 0.5 0
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pair_coeff * *
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timestep 0.001
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fix 1 all nve/sphere
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fix 2 all gravity 1.0 spherical 0.0 -180.0
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fix xwalls all wall/gran hertz/history 4000.0 NULL 100.0 NULL 0 1 xplane 0 100
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fix ywalls all wall/gran hertz/history 4000.0 NULL 100.0 NULL 0 1 yplane 0 NULL
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region slab block 1.0 99.0 30 34.5 -0.5 0.5 units box
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fix ins all pour 1000 1 4767548 vol 0.4 10 diam range 0.5 1.0 region slab
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Particle insertion: 224 every 3000 steps, 1000 by step 12001
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fix 3 all enforce2d
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compute 1 all erotate/sphere
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thermo_style custom step atoms ke c_1 vol
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thermo 1000
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thermo_modify lost ignore norm no
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compute_modify thermo_temp dynamic/dof yes
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#dump id all atom 250 dump.pour
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#dump 2 all image 500 image.*.jpg type type # zoom 1.6 adiam 1.5
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#dump_modify 2 pad 5
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#dump 3 all movie 500 movie.mpg type type # zoom 1.6 adiam 1.5
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#dump_modify 3 pad 5
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run 25000
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Generated 0 of 0 mixed pair_coeff terms from geometric mixing rule
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Neighbor list info ...
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update: every = 1 steps, delay = 0 steps, check = yes
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max neighbors/atom: 2000, page size: 100000
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master list distance cutoff = 1.2
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ghost atom cutoff = 1.2
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binsize = 0.6, bins = 167 84 2
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1 neighbor lists, perpetual/occasional/extra = 1 0 0
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(1) pair gran/hertz/history, perpetual
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attributes: half, newton off, size, history
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pair build: half/size/bin/newtoff
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stencil: full/bin/2d
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bin: standard
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Per MPI rank memory allocation (min/avg/max) = 5.77 | 5.77 | 5.77 Mbytes
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Step Atoms KinEng c_1 Volume
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0 0 -0 0 5000
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1000 224 202.80417 0 5000
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2000 224 373.00249 0 5000
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3000 224 599.26757 0 5000
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4000 448 1078.4787 0 5000
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5000 448 1589.4845 0 5000
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6000 448 1743.8281 26.918824 5000
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WARNING: Fewer insertions than requested (src/GRANULAR/fix_pour.cpp:681)
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7000 669 1818.5075 88.370238 5000
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8000 669 1850.1368 105.77613 5000
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9000 669 1757.9791 107.52328 5000
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WARNING: Fewer insertions than requested (src/GRANULAR/fix_pour.cpp:681)
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10000 886 1792.8816 79.515458 5000
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11000 886 1639.0751 64.104716 5000
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12000 886 1541.1046 55.902437 5000
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13000 1000 1461.0291 68.011357 5000
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14000 1000 1286.1144 48.551003 5000
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15000 1000 1155.6137 55.503871 5000
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16000 1000 833.49034 46.163926 5000
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17000 1000 581.69308 43.140124 5000
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18000 1000 369.375 37.675729 5000
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19000 1000 188.74424 31.66369 5000
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20000 1000 48.73107 23.067611 5000
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21000 1000 27.652985 14.176945 5000
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22000 1000 22.545416 9.6960211 5000
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23000 1000 17.575825 6.6345699 5000
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24000 1000 12.464163 4.9073459 5000
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25000 1000 9.9507487 3.1967219 5000
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Loop time of 0.793403 on 4 procs for 25000 steps with 1000 atoms
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Performance: 2722450.224 tau/day, 31509.841 timesteps/s, 31.510 Matom-step/s
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99.2% CPU use with 4 MPI tasks x 1 OpenMP threads
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MPI task timing breakdown:
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Section | min time | avg time | max time |%varavg| %total
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---------------------------------------------------------------
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Pair | 0.2392 | 0.24458 | 0.25441 | 1.2 | 30.83
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Neigh | 0.075663 | 0.07738 | 0.078869 | 0.4 | 9.75
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Comm | 0.037752 | 0.045698 | 0.049012 | 2.2 | 5.76
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Output | 0.00063359 | 0.0006788 | 0.00078796 | 0.0 | 0.09
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Modify | 0.30883 | 0.3111 | 0.31377 | 0.3 | 39.21
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Other | | 0.114 | | | 14.36
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Nlocal: 250 ave 254 max 244 min
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Histogram: 1 0 0 0 0 0 0 2 0 1
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Nghost: 19.75 ave 28 max 11 min
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Histogram: 1 0 1 0 0 0 0 0 1 1
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Neighs: 600 ave 624 max 569 min
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Histogram: 1 0 0 1 0 0 0 0 1 1
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Total # of neighbors = 2400
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Ave neighs/atom = 2.4
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Neighbor list builds = 2138
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Dangerous builds = 0
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Total wall time: 0:00:00
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