\(\renewcommand{\AA}{\text{Å}}\)

# compute smd/tlsph/num/neighs command

## Syntax

    compute ID group-ID smd/tlsph/num/neighs

- ID, group-ID are documented in compute command

- smd/tlsph/num/neighs = style name of this compute command

## Examples

    compute 1 all smd/tlsph/num/neighs

## Description

Define a computation that calculates the number of particles inside of the smoothing kernel radius for particles interacting via the Total-Lagrangian SPH pair style.

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

## Output info

This compute calculates a per-particle vector, which can be accessed by any command that uses per-particle values from a compute as input. See the Howto output page for an overview of LAMMPS output options.

The per-particle values are dimensionless. See units.

## Restrictions

This compute 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.

This quantity will be computed only for particles which interact with the Total-Lagrangian pair style.

## Related commands

smd/ulsph/num/neighs

## Default

none