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README
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README
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This is the LAMMPS (21 May 2008) software package.
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This is the LAMMPS (6 Jan 2009) software package.
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LAMMPS stands for Large-scale Atomic/Molecular Massively Parallel
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Simulator.
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@ -20,7 +20,7 @@ The primary author of the code is Steve Plimpton, who can be emailed
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at sjplimp@sandia.gov. The LAMMPS WWW Site at lammps.sandia.gov has
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more information about the code and its uses.
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The LAMMPS (21 May 2008) distribution includes the following files
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The LAMMPS (6 Jan 2009) distribution includes the following files
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and directories:
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README this file
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@ -8,7 +8,7 @@ newton off
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read_data data.chute
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pair_style gran/history 200000.0 50.0 0.5 0
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pair_style gran/hooke/history 200000.0 NULL 50.0 NULL 0.5 0
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pair_coeff * *
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neighbor 0.1 bin
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@ -15,14 +15,21 @@ neigh_modify delay 0
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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/history 2000.0 50.0 0.5 0
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pair_style gran/hooke/history 2000.0 NULL 50.0 NULL 0.5 0
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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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variable kn equal 2000.0
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variable gamman equal 50.0
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#variable kn equal 2000.0*sqrt(2.0)
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#variable gamman equal 50.0*sqrt(2.0)
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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 zlower all wall/gran zplane 0.0 2000.0 50.0 0.5
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fix zlower all wall/gran ${kn} NULL ${gamman} NULL 0.5 0 &
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zplane 0.0 2000.0
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region slab block -9.0 9.0 -9.0 9.0 10.0 15.0 units box
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fix ins all pour 3000 1 300719 vol 0.13 50 region slab
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@ -11,20 +11,25 @@ create_box 1 reg
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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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# 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 = 2.0e5 and dt = 0.0001, as in bench/in.chute.
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# k = 4.0e5 and dt = 0.0001, as in bench/in.chute (it if were Hertzian).
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pair_style gran/hertzian 2000.0 50.0 0.5 0
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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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variable kn equal 2000.0*sqrt(2.0)
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variable gamman equal 50.0*sqrt(2.0)
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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 xplane 0 100 50 0
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fix ywalls all wall/gran yplane 0 NULL 50 0
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fix xwalls all wall/gran ${kn} NULL ${gamman} NULL 0 1 &
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xplane 0 100
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fix ywalls all wall/gran ${kn} NULL ${gamman} NULL 0 1 &
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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 &
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