# fix smd/integrate_tlsph command

## Syntax

``` LAMMPS
fix ID group-ID smd/integrate_tlsph keyword values
```

-   ID, group-ID are documented in [fix](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

``` LAMMPS
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](PDF/MACHDYN_LAMMPS_userguide.pdf)\_ 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](Build_package) page
for more info.

## Related commands

[smd/integrate_ulsph](fix_smd_integrate_ulsph)

## Default

none