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< CENTER > < A HREF = "http://lammps.sandia.gov" > LAMMPS WWW Site< / A > - < A HREF = "Manual.html" > LAMMPS Documentation< / A > - < A HREF = "Section_commands.html#comm" > LAMMPS Commands< / A >
< / CENTER >
< HR >
< H3 > fix lb/pc command
< / H3 >
< P > < B > Syntax:< / B >
< / P >
< PRE > fix ID group-ID lb/pc
< / PRE >
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< UL > < LI > ID, group-ID are documented in the < A HREF = "fix.html" > fix< / A > command
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< LI > lb/pc = style name of this fix command
< / UL >
< P > < B > Examples:< / B >
< / P >
< PRE > fix 1 all lb/pc
< / PRE >
< P > < B > Description:< / B >
< / P >
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< P > Update the positions and velocities of the individual particles
described by < I > group-ID< / I > , experiencing velocity-dependent hydrodynamic
forces, using the integration algorithm described in < A HREF = "#Mackay" > Mackay et
al.< / A > . This integration algorithm should only be used if a
user-specified value for the force-coupling constant used in < A HREF = "fix_lb_fluid.html" > fix
lb/fluid< / A > has been set; do not use this integration
algorithm if the force coupling constant has been set by default.
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< / P >
< P > < B > Restart, fix_modify, output, run start/stop, minimize info:< / B >
< / P >
< P > No information about this fix is written to < A HREF = "restart.html" > binary restart
files< / A > . None of the < A HREF = "fix_modify.html" > fix_modify< / A > options
are relevant to this fix. No global or per-atom quantities are stored
by this fix for access by various < A HREF = "Section_howto.html#4_15" > output
commands< / A > . No parameter of this fix can be
used with the < I > start/stop< / I > keywords of the < A HREF = "run.html" > run< / A > command.
This fix is not invoked during < A HREF = "minimize.html" > energy minimization< / A > .
< / P >
< P > < B > Restrictions:< / B >
< / P >
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< P > This fix is part of the USER-LB package. It is only enabled if LAMMPS
was built with that package. See the < A HREF = "Section_start.html#start_3" > Making
LAMMPS< / A > section for more info.
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< / P >
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< P > Can only be used if a lattice-Boltzmann fluid has been created via the
< A HREF = "fix_lb_fluid.html" > fix lb/fluid< / A > command, and must come after this
command.
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< / P >
< P > < B > Related commands:< / B >
< / P >
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< P > < A HREF = "fix_lb_fluid.html" > fix lb/fluid< / A > < A HREF = "fix_lb_rigid_pc_sphere.html" > fix
lb/rigid/pc/sphere< / A >
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< / P >
< P > < B > Default:< / B > None.
< / P >
< HR >
< A NAME = "Mackay" > < / A >
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< P > < B > (Mackay et al.)< / B > 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.
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