mirror of https://github.com/lammps/lammps.git
59 lines
1.7 KiB
Plaintext
59 lines
1.7 KiB
Plaintext
"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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compute smd/tlsph/dt command :h3
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[Syntax:]
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compute ID group-ID smd/tlsph/dt :pre
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ID, group-ID are documented in "compute"_compute.html command
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smd/tlsph/dt = style name of this compute command :ul
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[Examples:]
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compute 1 all smd/tlsph/dt :pre
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[Description:]
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Define a computation that outputs the CFL-stable time increment per
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particle. This time increment is essentially given by the speed of
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sound, divided by the SPH smoothing length. Because both the speed of
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sound and the smoothing length typically change during the course of a
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simulation, the stable time increment needs to be recomputed every
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time step. This calculation is performed automatically in the
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relevant SPH pair styles and this compute only serves to make the
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stable time increment accessible for output purposes.
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See "this PDF guide"_USER/smd/SMD_LAMMPS_userguide.pdf to using Smooth
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Mach Dynamics in LAMMPS.
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[Output info:]
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This compute calculates a per-particle vector, which can be accessed
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by any command that uses per-particle values from a compute as input.
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See "How-to discussions, section 6.15"_Section_howto.html#howto_15 for
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an overview of LAMMPS output options.
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The per-particle values will be given in "units"_units.html of time.
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[Restrictions:]
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This compute 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
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LAMMPS"_Section_start.html#start_3 section for more info.
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This compute can only be used for particles interacting with the
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Total-Lagrangian SPH pair style.
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[Related commands:]
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"smd/adjust/dt"_fix_smd_adjust_dt.html
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[Default:] none
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