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# fix smd/integrate_tlsph command

## Syntax

    fix ID group-ID smd/integrate_tlsph keyword values

- ID, group-ID are documented in fix command

- smd/integrate_tlsph = style name of this fix command

- zero or more keyword/value pairs may be appended

- keyword = limit_velocity

    limit_velocity value = max_vel
      max_vel = maximum allowed velocity

## Examples

    fix 1 all smd/integrate_tlsph
    fix 1 all smd/integrate_tlsph limit_velocity 1000

## Description

The fix performs explicit time integration for particles which interact according with the Total-Lagrangian SPH pair style.

See this PDF guide to using Smooth Mach Dynamics in LAMMPS.

The limit_velocity keyword will control the velocity, scaling the norm of the velocity vector to max_vel in case it exceeds this velocity limit.

## Restart, fix_modify, output, run start/stop, minimize info

Currently, no part of MACHDYN supports restarting nor minimization. This fix has no outputs.

## Restrictions

This fix is part of the MACHDYN package. It is only enabled if LAMMPS was built with that package. See the Build package page for more info.

Changed in version 29Aug2024.

This fix is incompatible with deformation controls that remap velocity, for instance the remap v option of fix deform.

## Related commands

smd/integrate_ulsph

## Default

none