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Add some clarifications to the doc

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Vladislav Galigerov
2024-02-21 20:49:19 +03:00
parent ec0535172c
commit e20ea968b9
1 changed files with 8 additions and 1 deletions
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doc/src/fix_wall_flow.rst
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@ -66,7 +66,10 @@ N+1 walls.
Each time a particle in the specified group passes through one of the Each time a particle in the specified group passes through one of the
transparent walls, its velocity is re-assigned. Particles not in the transparent walls, its velocity is re-assigned. Particles not in the
group do not interact with the wall. group do not interact with the wall. This can be used, for example, to
add obstacles composed of atoms, or to simulate a solution of complex
molecules in a one-atom liquid (note that the fix has been tested for
one-atom systems only).
Conceptually, the velocity re-assignment represents creation of a new Conceptually, the velocity re-assignment represents creation of a new
particle within the system with simultaneous removal of the particle particle within the system with simultaneous removal of the particle
@ -147,6 +150,10 @@ if LAMMPS was built with that package. See the :doc:`Build package
Flow boundary conditions should not be used with rigid bodies such as Flow boundary conditions should not be used with rigid bodies such as
those defined by a "fix rigid" command. those defined by a "fix rigid" command.
This fix can only be used with periodic boundary conditions along the
flow axis. The size of the box in this direction must not change. Also,
the fix is designed to work only in an orthogonal simulation box.
Related commands Related commands
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