real abux:
This optional information parameter can be specified with
real abux f=E15.8 b=4 n='hydrogen abundance (number fraction)' u=1 &
c0='standard solar mixture'
0.90851003E+00
It has no practical consequences because the actually used
chemical composition is determined by the files for equation of state and opacity.
real abuy:
This optional information parameter can be specified with
real abuy f=E15.8 b=4 n='helium abundance (number fraction)' u=1 &
c0='standard solar mixture'
0.90850003E-01
It has no practical consequences because the actually used
chemical composition is determined by the files for equation of state and opacity.
real qmol:
This optional information parameter can be specified with
real qmol f=E15.8 b=4 n='mean molecular weight' u=u &
c0='standard solar mixture'
0.13018000E+01
It has no practical consequences because the actually used
chemical composition is determined by the files for equation of state and opacity.
real gamma:
This optional information parameter can be specified with
real gamma f=E15.8 b=4 n='Adiabatic coefficient' u=1 &
c0='0.0/1.6666666666666/1.4'
0.0
It has no practical consequences because the actually used
chemical composition is determined by the files for equation of state and opacity.
gravcorr_terms:
In former versions of CO5BOLD the type of the coupling of gravity into the Roe solver
could be specified with
character gravcorr_terms f=A80 b=80 &
n='Type of gravity correction in Roe solver' &
c0='off0/default0/default/default2/default3'
default5
In recent versions this coupling has to be specified at compile time
with the switch rhd_hyd_gravcorr_p01,
see Sect. 3.7
real c_visneu1:
real c_visneu1 f=E15.8 b=4 &
n='Linear viscosity parameter (von Neumann-Richtmyer type)' u=1
0.0
real c_visneu2:
real c_visneu2 f=E15.8 b=4 &
n='Quadratic viscosity parameter (von Neumann-Richtmyer type)' u=1
0.0
real c_radkappasmooth:
In the LHDrad module the opacity along each ray can be smoothed.
The amount of smoothing can be set e.g. with
real c_radkappasmooth f=E15.8 b=4 n='Opacity smoothing parameter' u=1 &
c0='0.0: no smoothing, 0.25: light smoothing, 0.666: strong smoothing'
0.0
The smoothing can perhaps reduce the noise in the intensity images somewhat but
has no general beneficial effect and should usually not be used.
real c_radtsmooth:
In the LHDrad module the 3D temperature array can be smoothed.
The amount of smoothing can be set e.g. with
real c_radtsmooth f=E15.8 b=4 n='Temperature smoothing parameter' u=1 &
c0='0.0: no smoothing, 0.5: reasonable smoothing, 1.0: max. smoothing'
0.0
The smoothing can sometimes reduce the noise in the intensity images
but causes/amplifies some anomalies of the radiative Greens function:
Some cool cell just above the sharp sub-photospheric temperature drop are not heated but cool
further down. Negative temperature spikes may result.
This smoothing should not be used anymore.
character radpressure:
In the LHDrad module
there exists a simple prescription for the radiative pressure
(reasonable in the optically thin)
which can be activated with
character radpressure f=A80 b=80 n='Radiation pressure mode' &
c0='on/off'
on
Allowed values are
on: Radiation pressure on.
off: Radiation pressure off.
The scheme is pretty slow and wrong in the optically thick.
Do not use!
real c_radtintminfac:
In the LHDrad module:
The fraction the interpolated temperature (at a point on the ray)
may exceed the minimum temperature at its four neighbors on the HD grid
can be set e.g. with
real c_radtintminfac f=E15.8 b=4 &
n='Temperature interpolation parameter' u=1 &
c0='<1.0: only bilinear, 1.1: reasonable weighting between min. und bil.'
0.0
The introduction of this parameter was an attempt to reduce the negative (cooling)
effect of a single hot cell on its cool neighbors.
It should be switched off e.g. by setting it to 0.0.
integer dtimestep_out_fine:
This parameter can be specified but there is no corresponding output file in CO5BOLD yet.
integer dtimestep_out_fine f=I4 b=4 n='Output time step number' u=1 &
c0='dtimestep_out_fine<0 => no output'
-1
character outfile_fine:
The name of the file for the output of additional information
at regular (small) intervals
can be specified with e.g.
character outfile_fine f=A80 b=80 n='Output file name'
rhd.fine
Leaving it empty means that no file of this type is written.
Specifying it means the same (yet).
character outform_fine:
The format (see Sect. 4.3.1) of the files with frequent output
can be chosen e.g. with
character outform_fine f=A80 b=80 n='Output file format' &
c0='formatted/unformatted'
unformatted
Allowed values are
unformatted: (default) fast compact (possibly machine-dependent) output:
strongly recommended
formatted: slow (machine-independent) output, big files
This parameter can be specified but there is no corresponding output file in CO5BOLD yet.
character outconv_fine:
The conversion type (see Sect. 4.3.1) of the files with frequent output
can be specified e.g. with
character outconv_fine f=A80 b=80 n='Output file conversion' &
c0='ieee_4/ieee_8/crayxmp_8/native'
ieee_4
The allowed values depend on the machine.
Leaving this field empty means that the default is chosen that is build into the local UIO module.
If the type ieee_4 is supported (which is always the case, so far) it should be chosen.
This parameter can be specified but there is no corresponding output file in CO5BOLD yet.
