forked from lijiext/lammps
116 lines
4.3 KiB
Groff
116 lines
4.3 KiB
Groff
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LAMMPS (5 Oct 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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1 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 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 = 2.75186 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 224 201.77464 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 1631.962 76.905078 5000
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11000 896 1590.1527 68.644552 5000
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12000 896 1564.4707 60.119562 5000
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13000 1000 1490.072 56.982972 5000
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14000 1000 1266.4669 57.579371 5000
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15000 1000 1034.1055 46.079374 5000
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16000 1000 748.70283 43.933154 5000
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17000 1000 462.65166 37.522016 5000
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18000 1000 327.40481 29.450285 5000
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19000 1000 223.24319 31.981144 5000
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20000 1000 54.792042 23.449101 5000
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21000 1000 25.805484 16.352528 5000
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22000 1000 20.617765 11.756965 5000
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23000 1000 16.115382 7.9435503 5000
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24000 1000 11.971003 5.9411126 5000
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25000 1000 10.404117 4.3811155 5000
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Loop time of 3.00132 on 1 procs for 25000 steps with 1000 atoms
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Performance: 719682.852 tau/day, 8329.663 timesteps/s
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99.9% CPU use with 1 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 | 1.2554 | 1.2554 | 1.2554 | 0.0 | 41.83
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Neigh | 0.4288 | 0.4288 | 0.4288 | 0.0 | 14.29
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Comm | 0.0078034 | 0.0078034 | 0.0078034 | 0.0 | 0.26
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Output | 0.0003016 | 0.0003016 | 0.0003016 | 0.0 | 0.01
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Modify | 1.177 | 1.177 | 1.177 | 0.0 | 39.21
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Other | | 0.132 | | | 4.40
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Nlocal: 1000 ave 1000 max 1000 min
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Histogram: 1 0 0 0 0 0 0 0 0 0
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Nghost: 0 ave 0 max 0 min
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Histogram: 1 0 0 0 0 0 0 0 0 0
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Neighs: 2374 ave 2374 max 2374 min
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Histogram: 1 0 0 0 0 0 0 0 0 0
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Total # of neighbors = 2374
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Ave neighs/atom = 2.374
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Neighbor list builds = 2089
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Dangerous builds = 0
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Total wall time: 0:00:03
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