90 lines
3.2 KiB
Groff
90 lines
3.2 KiB
Groff
LAMMPS (22 June 2007)
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# Pour 2d granular particles into container
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dimension 2
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atom_style granular
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boundary f fm p
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newton off
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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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2 by 2 by 1 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 (2000) 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 = 2.0e5 and dt = 0.0001, as in bench/in.chute.
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pair_style gran/hertzian 2000.0 50.0 0.5 0
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timestep 0.001
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fix 1 all nve/gran
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fix 2 all gravity spherical 90.0 -90.0
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fix xwalls all wall/gran xplane 0 100 50 0
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fix ywalls all wall/gran yplane 0 NULL 50 0
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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 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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thermo_style granular
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thermo 1000
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thermo_modify lost ignore
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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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run 25000
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Memory usage per processor = 0.335693 Mbytes
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Step Atoms KinEng RotKEgrn Volume
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0 0 -0 0 5000
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1000 224 348.20549 0 5000
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2000 224 650.98655 0 5000
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3000 224 1056.0039 0 5000
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4000 448 1941.6817 0 5000
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5000 448 2869.092 0 5000
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6000 448 3240.26 51.002089 5000
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7000 672 3375.857 86.854847 5000
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8000 672 3218.9668 120.74194 5000
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9000 672 3042.428 99.125785 5000
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10000 896 2986.9988 88.590035 5000
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11000 896 2829.9982 65.795595 5000
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12000 896 2742.1752 65.335529 5000
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13000 1000 2701.7207 61.182084 5000
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14000 1000 2478.5724 53.465798 5000
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15000 1000 2079.7846 63.176195 5000
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16000 1000 1440.481 54.982049 5000
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17000 1000 809.4817 47.009446 5000
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18000 1000 588.67412 33.215005 5000
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19000 1000 259.55248 27.403802 5000
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20000 1000 39.743003 14.941136 5000
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21000 1000 20.085002 8.8303457 5000
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22000 1000 11.861124 6.1014125 5000
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23000 1000 11.065631 3.3946532 5000
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24000 1000 5.1323063 2.011498 5000
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25000 1000 2.6809517 1.3185775 5000
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Loop time of 7.24504 on 4 procs for 25000 steps with 1000 atoms
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Pair time (%) = 1.30585 (18.024)
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Neigh time (%) = 0.24281 (3.35139)
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Comm time (%) = 1.61472 (22.2872)
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Outpt time (%) = 0.187656 (2.59012)
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Other time (%) = 3.89401 (53.7472)
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Nlocal: 250 ave 501 max 0 min
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Histogram: 2 0 0 0 0 0 0 0 0 2
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Nghost: 5.75 ave 13 max 0 min
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Histogram: 2 0 0 0 0 0 0 1 0 1
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Neighs: 620 ave 1246 max 0 min
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Histogram: 2 0 0 0 0 0 0 0 0 2
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Total # of neighbors = 2480
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Ave neighs/atom = 2.48
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Neighbor list builds = 1606
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Dangerous builds = 0
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