In the Gap Conductance tab, define the heat transfer between two surfaces. Two definitions are possible, both of which can be combined:

 

If enabled, the upper part of the dialog writes a *GAP CONDUCTANCE card with the distance versus conductance relationship entered in the table. If you enable the Pressure dependent definition in the lower part of the dialog, the same card with an additional PRESSURE parameter is written out, specifying a pressure versus conductance relationship.

For both tables, additional dependencies can be specified by increasing the number in the No of Dependencies field.