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### compute smd/ulsph_strain command

Syntax:

    compute ID group-ID smd/ulsph_strain

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

Examples:

    compute 1 all smd/ulsph_strain

Description:

Define a computation that outputs the logarithmic strain tensor. 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 calculates a per-particle tensor, which can be accessed by any command that uses per-particle values from a compute as input. See Section_howto 15 for an overview of LAMMPS output options.

The per-particle vector has 6 entries, corresponding to the xx, yy, zz, xy, xz, yz components of the symmetric strain rate tensor.

The per-particle tensor values will be given dimensionless, 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:

smd/tlsph_strain

Default: none