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This parameter defines the disk aspect ratio
at 
. It must be used together with [FlaringIndex->29] to define it everywhere. Defining the disk thickness in a 2D code might seem surprising. It actually means that one initializes the sound speed 
, since this later is linked to 
through:
is the orbital Keplerian speed.
Note that it is possible to override the sound speed profile implied byAspectRatioand [FlaringIndex->29] by providing, in the output directory (defined by [OutputDir->43]), an ASCII file namedsoundspeed.datwhich must contain [Nrad->38] entries that sample the desired sound speed profile at the zone centers. An arbitrary sound speed profile can therefore be used.
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