17.3. Passive Scalar Equation for Wall Film

Transport equation for a passive scalar in wall film is given by:

(17–38)

where,
	= arbitrary passive scalar
	= film height
	= mean film velocity
	= liquid density
	= scalar related mass source term per unit area
	= diffusivity for the scalar

If you select the Passive Scalar option in the Eulerian Wall Film dialog box, the Fluent solver uses Equation 17–38 to solve the transportation of a passive scalar due to film convection and scalar diffusion. Note that the solution of the passive scalar transport has no influence on the solution of wall film equations. For more details, see Setting Eulerian Wall Film Model Options in the Fluent User's Guide.