You can use DES_USR_VAR for this, for an example see How can I output the drag coefficient from maybe the drag subroutine where this is explaned for the drag coefficient, doing it for the heat transfer coefficient should be very similar.
You can use DES_USR_VAR for this, for an example see How can I output the drag coefficient from maybe the drag subroutine where this is explaned for the drag coefficient, doing it for the heat transfer coefficient should be very similar.