Up: Transport Models
Previous: Guzdar-Drake Drift-Resistive Ballooning Model
For transport due to the kinetic ballooning mode, we compute and
the thermal diffusivities in terms of the pressure gradient .
and where is the ideal pressure gradient threshold for
the onset of the ideal ballooning mode in geometry,
Here, cswitch(8)=1 by default, but is included for flexibility.
The coefficent in the expression for is set equal to
The diffusivities are then given as:
where fkb(1), fkb(2),
fkb(3), and cswitch(5).
Note that the new version does not include
the (5/2) factor in the thermal diffusivities.
The relevant coding is: