*GAP ELECTRICAL CONDUCTANCE

Optional parameters

DEPENDENCIES: Set this parameter equal to the number of field variables on which $σ_{g}$ depends.
PRESSURE: Include this parameter to indicate that $σ_{g}$ is a function of the contact pressure between the surfaces, p. Omit this parameter to define $σ_{g}$ as a function of the clearance, d, between the surfaces.
USER: Include this parameter to define $σ_{g}$ in user subroutine GAPELECTR. In this case the DEPENDENCIES parameter and any data lines are ignored.

Data lines to define the gap electrical conductance directly

First line

Electrical conductivity, $σ_{g}$ . (Units of CT⁻¹L⁻² $φ$ ⁻¹.)
Surface separation, d, or surface pressure, p.
Average temperature, $\bar{θ}$ .
Average value of the first field variable, $\bar{f_{1}}$ .
Average value of the second field variable, $\bar{f_{2}}$ .
Etc.

Repeat this data line as often as necessary to define the dependence of gap electrical conductance on the surface separation, average surface temperature, and the average of any predefined field variables on the surfaces.