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quadforce - quadrupole-order force calculation of an N-body system.
quadforce
in=snapshot [parameter=value] ...
quadforce computes a quadrupole-order
force calculation of a snapshot N-body system. (see also quadcode(1NEMO)
).
The output can be either in the form of the snapshot, or a table, in
which case quadrupole-oder forces can be inserted in other snapshots (see
quadinter(1NEMO)
).
The following parameters are recognized in
any order if the keyword is also given:
- in=snaphot
- Input file with N-body
snapshot. No default.
- out=
- Optional snapshot output file with forces and
potentials. This output is optional.
- quad=
- Output file with quadrupole field
tables. This output is optional.
- eps_r=
- Radial softening parameter. [Default:
0.05]
- eps_t=
- Tangential softening parameter. [Default: 0.07]
The
code has a hardcoded maximum number of particles, through the macro MBODY.
(currently 4096). If more are needed, it needs to be recompiled. See comments
in quadcode(1NEMO)
Joshue Barnes
quadcode(1NEMO)
, quadinter(1NEMO)
4-mar-89 V1.0 Old version JEB
12-nov-91 V1.1 FOr new nemo V2. PJT
6-may-92 V1.1a man page written, added some warnings PJT
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