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mkjet - create a toy model for a jet
mkjet out=snapshot [parameter=value]
mkjet creates a toy model of a jet, with particles distributed
uniformely along a cone with given (constant) opening angle theta. The outflow
velocity can be varied using an expansion curve, that gives expansion velocity
as function of radius.
The following parameters are recognized
in any order if the keyword is also given:
- out=
- Output snapshot file name.
No default./
- nbody=
- Number of particles. [Default: 256].
- theta=
- (full) Opening
angle of jet, in degrees. Default: 10.
- r=
- Sample radii along jet. A number
of radii have to be given, for which expansion velocities will have to
be given.
- v=
- Expansion velocities along jet radii, as given by rad=. Each
radius must have a matching velocity, although if fewer velocities are
given, the last ones are simply repeated.
- rmin=
- Inner radius if the jet.
[Default: 0].
- rmax=
- Outer radius of the jet. [Default: 2].
- nmodel=
- Number
of models to write. [Default: 1].
- seed=
- Random seed. 0 is taken as the current
time of the day, and as such a good choice for fully random samples. [Default:
0]
- headline=
- Random verbiage added to the snapshot . By default none.
Since
there is no table input for the radial expansion curve yet, you have to
provide a series of radii and velocities through the r= and v= keywords.
Although it requires you to use two temporary files, one for each column,
the following NEMO shortcut may be handy in this case (assuming you have
a table with radius and velocity in the first two columns)
tabmath table1 tab.r %1 all
tabmath table1 tab.v %2 all
mkjet .... r=@tab.r v=@tab.v
snapshot(5NEMO)
(still private)
Peter Teuben
29-mar-96 V0.1 Created PJT
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