Outgassing Wall
In the molecular flow limit (Knudsen number, Kn>10), use the Outgassing Wall boundary condition to represent a wall or surface that is outgassing at a specified rate in addition to reemitting incident molecules diffusely. In this case the emitted molecular flux, J, is given by J = G + Jout, where Jout is the user-specified outgassing flux. Jout can be specified as a molecular flux, a mass flux, a number of SCCM units, or a total mass flow. The wall is assumed to be stationary.
Outgassing Wall
Select the Boundary condition: Directly (the default), Number of SCCM units, Mass flux, or Total mass flow.
The rest of the settings are the same as for the Diffuse Flux node.