forked from lijiext/lammps
116 lines
4.3 KiB
Groff
116 lines
4.3 KiB
Groff
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LAMMPS (15 Feb 2016)
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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 4000.0 NULL 100.0 NULL 0 1 xplane 0 100
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fix ywalls all wall/gran 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 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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Neighbor list info ...
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2 neighbor list requests
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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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Memory usage per processor = 2.71741 Mbytes
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Step Atoms KinEng 1 Volume
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0 0 -0 0 5000
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1000 224 201.77464 0 5000
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2000 224 372.42868 0 5000
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3000 224 599.60221 0 5000
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4000 448 1084.3752 0 5000
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5000 448 1592.4543 0 5000
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6000 448 1763.3153 37.274939 5000
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7000 672 1805.206 89.331853 5000
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8000 672 1778.0015 111.58381 5000
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9000 672 1592.6805 97.550311 5000
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10000 896 1630.8521 79.742572 5000
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11000 896 1593.1588 67.633788 5000
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12000 896 1562.2084 65.097236 5000
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13000 1000 1504.1203 63.468934 5000
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14000 1000 1266.5724 55.837334 5000
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15000 1000 1041.8665 48.938774 5000
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16000 1000 766.27305 43.846151 5000
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17000 1000 466.30103 43.206188 5000
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18000 1000 320.50154 26.84775 5000
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19000 1000 207.91453 29.183522 5000
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20000 1000 52.447982 19.30378 5000
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21000 1000 22.027641 10.395933 5000
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22000 1000 15.395099 6.7003289 5000
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23000 1000 11.97674 5.2548063 5000
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24000 1000 7.8974699 3.7396899 5000
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25000 1000 6.1288038 2.2056805 5000
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Loop time of 0.977215 on 4 procs for 25000 steps with 1000 atoms
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Performance: 2210364.086 tau/day, 25582.918 timesteps/s
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98.8% CPU use with 4 MPI tasks x no 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 | 0.30766 | 0.33267 | 0.35001 | 3.1 | 34.04
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Neigh | 0.094669 | 0.1019 | 0.10693 | 1.6 | 10.43
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Comm | 0.060945 | 0.078421 | 0.097028 | 5.5 | 8.02
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Output | 0.00042653 | 0.00045699 | 0.00049639 | 0.1 | 0.05
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Modify | 0.2936 | 0.30701 | 0.31712 | 1.7 | 31.42
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Other | | 0.1568 | | | 16.04
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Nlocal: 250 ave 267 max 232 min
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Histogram: 1 0 0 0 1 1 0 0 0 1
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Nghost: 18 ave 23 max 14 min
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Histogram: 2 0 0 0 0 0 0 1 0 1
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Neighs: 606 ave 664 max 559 min
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Histogram: 1 0 1 0 0 1 0 0 0 1
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Total # of neighbors = 2424
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Ave neighs/atom = 2.424
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Neighbor list builds = 2060
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Dangerous builds = 0
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Total wall time: 0:00:00
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