8.5.3 Thermal Conductivity Using Kinetic Theory

If you are using the gas law (as described in Section  8.3), you have the option to define the thermal conductivity using kinetic theory as

where $R$ is the universal gas constant, $M_w$ is the molecular weight, $\mu$ is the material's specified or computed viscosity, and $c_p$ is the material's specified or computed specific heat capacity.

To enable the use of this equation for calculating thermal conductivity, select kinetic-theory from the drop-down list to the right of Thermal Conductivity in the Create/Edit Materials dialog box. The solver will use Equation  8.5-5 to compute the thermal conductivity.