Specify the sound speed ratio across the temperature transition
Author: Frederic Masset
TransitionRatiois the thickness ratio of the outer to the inner disk. Beyond the transition (r > TransitionRadius), the thickness profile is whatever is given by
AspectRatio, while before the transition it corresponds to this profile multiplied by
TransitionRatio. Note that the
FlaringIndexparameter should be set to 0 when defining a temperature transition.