6.3.4 Hooking DEFINE_MASS_TRANSFER UDFs

After you have interpreted (Chapter  4) or compiled (Chapter  5) your DEFINE_MASS_TRANSFER UDF, the name of the function you supplied as a DEFINE macro argument will become visible and selectable in the Phase Interaction dialog box (Figure  6.3.6).

To hook the UDF to ANSYS FLUENT, first make a selection from the Model list of the Multiphase Model dialog box.

Models Multiphase Edit...

Next, open the Phase Interaction dialog box (Figure  6.3.6).

Phases Interaction...

Figure 6.3.6: The Phase Interaction Dialog Box

Click the Mass tab and then specify the Number of Mass Transfer Mechanisms greater than $0$. The Mechanism drop-down list will appear. Next, select user-defined from the Mechanism drop-down list to open the User-Defined Functions dialog box (Figure  6.3.7).

Figure 6.3.7: The User-Defined Functions Dialog Box

Select the function name (e.g., liq_gas_source::udf) and click OK. The UDF name will appear in the text box below the Mechanism drop-down list in the Phase Interaction dialog box. Click OK to close the Phase Interaction dialog box.

See Section  2.4.4 for details about writing DEFINE_MASS_TRANSFER functions.