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### compute smd/ulsph/num/neighs command

Syntax:

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

- ID, group-ID are documented in compute command
- smd/ulsph/num/neighs = style name of this compute command

Examples:

    compute 1 all smd/ulsph/num/neighs

Description:

Define a computation that returns the number of neighbor particles inside of the smoothing kernel radius for particles interacting via the updated Lagrangian SPH pair style.

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

Output info:

This compute returns a per-particle vector, which can be accessed by any command that uses per-particle values from a compute as input. See Section 6.15 for an overview of LAMMPS output options.

The per-particle values will be given dimentionless, see units.

Restrictions:

This compute is part of the USER-SMD package. It is only enabled if LAMMPS was built with that package. See the Making LAMMPS section for more info. This compute can only be used for particles which interact with the updated Lagrangian SPH pair style.

Related commands:

compute smd/tlsph/num/neighs

Default: none