fix lb/pc command


fix ID group-ID lb/pc
  • ID, group-ID are documented in the fix command

  • lb/pc = style name of this fix command


fix 1 all lb/pc


Update the positions and velocities of the individual particles described by group-ID, experiencing velocity-dependent hydrodynamic forces, using the integration algorithm described in Mackay et al.. This integration algorithm should only be used if a user-specified value for the force-coupling constant used in fix lb/fluid has been set; do not use this integration algorithm if the force coupling constant has been set by default.

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

No information about this fix is written to binary restart files. None of the fix_modify options are relevant to this fix. No global or per-atom quantities are stored by this fix for access by various output commands. No parameter of this fix can be used with the start/stop keywords of the run command. This fix is not invoked during energy minimization.


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

Can only be used if a lattice-Boltzmann fluid has been created via the fix lb/fluid command, and must come after this command.



(Mackay et al.) Mackay, F. E., Ollila, S.T.T., and Denniston, C., Hydrodynamic Forces Implemented into LAMMPS through a lattice-Boltzmann fluid, Computer Physics Communications 184 (2013) 2021-2031.