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.

This section is only available when the node is added from one of the versions of the Heat Transfer interface (ht). Specify a value for the Fracture thickness dfr. The default is 0.01 m.

By default, the Boundary material is used.

By default, the Boundary material is used. The Volume fraction θfr should be specified. The default is 0.

The default Thermal conductivity kfr is taken From material. For User defined select Isotropic, Diagonal, Symmetric, or Anisotropic based on the characteristics of the thermal conductivity, and enter another value or expression. Select an Effective conductivity: Volume average (the default) or Power law.

The default Density ρfr and Specific heat capacity Cp, fr are taken From material. See Material Density in Features Defined on the Material Frame if a temperature-dependent density should be set. For User defined enter other values or expressions.

More locations are available if the Heat transfer in porous media check box is selected under the Physical Model section. For example:
Heat Transfer in Solids>Fracture
Heat Transfer in Solids>Pairs>Fracture
Heat Transfer in Thin Shells>Fracture

Physics Tab with interface as Heat Transfer, Heat Transfer in Solids, Heat Transfer in Fluids, Heat Transfer in Porous Media, Heat Transfer in Building Materials, Bioheat Transfer, Heat Transfer with Surface-to-Surface Radiation or Heat Transfer with Radiation in Participating Media selected:
Boundaries>interface>Fracture
Pairs>interface>Fracture

Physics Tab with interface as Heat Transfer in Thin Shells, Heat Transfer in Thin Films or Heat Transfer in Fractures selected:
Boundaries>interface>Fracture