.. index:: fix lb/pc fix lb/pc command ================= Syntax """""" .. parsed-literal:: fix ID group-ID lb/pc * ID, group-ID are documented in the :doc:`fix ` command * lb/pc = style name of this fix command Examples """""""" .. parsed-literal:: fix 1 all lb/pc Description """"""""""" Update the positions and velocities of the individual particles described by *group-ID*\ , experiencing velocity-dependent hydrodynamic forces, using the integration algorithm described in :ref:`Mackay et al. `. This integration algorithm should only be used if a user-specified value for the force-coupling constant used in :doc:`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 :doc:`binary restart files `. None of the :doc:`fix_modify ` options are relevant to this fix. No global or per-atom quantities are stored by this fix for access by various :ref:`output commands <4_15>`. No parameter of this fix can be used with the *start/stop* keywords of the :doc:`run ` command. This fix is not invoked during :doc:`energy minimization `. Restrictions """""""""""" This fix is part of the USER-LB package. It is only enabled if LAMMPS was built with that package. See the :ref:`Making LAMMPS ` section for more info. Can only be used if a lattice-Boltzmann fluid has been created via the :doc:`fix lb/fluid ` command, and must come after this command. Related commands """""""""""""""" :doc:`fix lb/fluid ` :doc:`fix lb/rigid/pc/sphere ` **Default:** None. ---------- .. _Mackay: **(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. .. _lws: http://lammps.sandia.gov .. _ld: Manual.html .. _lc: Section_commands.html#comm