RadialSpacing
This string parameter can be set
either to 'Arithmetic' or 'Logarithmic'. In the first case, the zone
radial width is a constant over the whole disk (i.e. the zone interface radii are
in arithmetic sequence), while in the second case, the zone radial
width is proportional to its distance to the mesh center (the zone
interface radii are in geometric sequence). In this last case, all
zones have the same aspect ratio (azimuthal over radial width).
The NRAD+1 interface radii are written in an
ASCII file named 'used_rad.dat'
in the output directory. Note that is possible to have an arbitrary
sequence of interface radii, more complex than an arithmetic or
geometric sequence, for instance if you need a high resolution in the
vicinity of a planet orbit. In order to do that, you need to create,
prior to the run execution, a file named 'radii.dat' in the output directory
(see OutputDir). This file must be in
ASCII format, and must contain a column of floating point values
representing the NRAD+1 interface radii, in
increasing order. Once the run is started, the 'used_rad.dat' file is created. One
can check that 'radii.dat' has
properly been read by checking that 'used_rad.dat'
contains the same values.