This node models edges (3D components) or point (2D and 2D axisymmetric components) with another thickness than the overall thickness that is specified in the Heat Transfer in Thin Shells interface Shell Thickness section (0.01 m by default). It defines the height of the part of the edge that is exposed to the ambient surroundings.

If this node is selected from the Pairs menu, choose the pair on which to apply this condition. A pair has to be created first. See Identity and Contact Pairs in the COMSOL Multiphysics Reference Manual for more details.

Enter a value for the Effective thickness ds. This value replaces the overall thickness in the selection.

 Heat Transfer in Thin Shells>Change Effective Thickness
 Heat Transfer in Thin Shells>Pairs>Change Effective Thickness

Physics Tab with Heat Transfer in Thin Shells selected:
Support>Heat Transfer in Thin Shells>Change Effective Thickness
Pairs>Change Effective Thickness

with Support as Egdes in 3D and Points in 2D.