forked from lijiext/lammps
57 lines
1.6 KiB
Plaintext
57 lines
1.6 KiB
Plaintext
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"LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c
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:link(lws,http://lammps.sandia.gov)
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:link(ld,Manual.html)
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:link(lc,Section_commands.html#comm)
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:line
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pair_style smd/hertz command :h3
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[Syntax:]
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pair_style smd/hertz scale_factor :pre
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[Examples:]
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pair_style smd/hertz 1.0
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pair_coeff 1 1 <contact_stiffness>
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[Description:]
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The {smd/hertz} style calculates contact forces between SPH particles belonging to different physical bodies.
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The contact forces are calculated using a Hertz potential, which evaluates the overlap between two particles
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(whose spatial extents are defined via its contact radius).
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The effect is that a particles cannot penetrate into each other.
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The parameter <contact_stiffness> has units of pressure and should equal roughly one half
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of the Young's modulus (or bulk modulus in the case of fluids) of the material model associated with the SPH particles.
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The parameter {scale_factor} can be used to scale the particles' contact radii. This can be useful to control how close
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particles can approach each other. Usually, {scale_factor}=1.0.
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:line
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[Mixing, shift, table, tail correction, restart, rRESPA info]:
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No mixing is performed automatically.
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Currently, no part of USER-SMD supports restarting nor minimization.
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rRESPA does not apply to this pair style.
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:line
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[Restrictions:]
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This fix is part of the USER-SMD package. It is only enabled if
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LAMMPS was built with that package. See the "Making LAMMPS"_Section_start.html#start_3
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section for more info.
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[Related commands:]
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"pair_coeff"_pair_coeff.html
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[Default:] none
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:line
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