44 lines
1.1 KiB
Plaintext
44 lines
1.1 KiB
Plaintext
units si
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atom_style sphere
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comm_modify vel yes
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boundary p p p
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region box block -0.01 0.01 -0.01 0.01 0 0.08
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create_box 2 box
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create_atoms 1 single 0.0 0.0 0.04
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create_atoms 1 single 0.0 0.0 0.04416
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set group all diameter 0.004 density 2500
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pair_style granular
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pair_coeff * * hertz/material 1e6 0.8 0.4 &
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tangential mindlin NULL 0.0 0.5 &
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damping coeff_restitution
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#pair_coeff * * hooke 1e6 0.5 &
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# tangential mindlin 1 1.0 0.0 &
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# damping coeff_restitution
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timestep 1e-9
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fix 1 all nve/sphere
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group a1 id 1
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group a2 id 2
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velocity a1 set 0 0 1.0
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velocity a2 set 0 0 -1.0
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compute z1 a1 reduce sum z
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compute z2 a2 reduce sum z
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compute v1 a1 reduce sum vz
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compute v2 a2 reduce sum vz
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compute f1 a1 reduce sum fz
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compute f2 a2 reduce sum fz
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variable dz equal c_z1 - c_z2
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# dump 1 all custom 2000000 op.dump id x y z vx vy vz
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thermo 10000
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thermo_style custom step ke v_dz c_v1 c_v2 c_f1 c_f2
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run 1000000
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