If you are using the Eulerian model to solve a turbulent flow, you will need to choose one of turbulence models described in Section 23.5.10 in the Viscous Model panel (Figure 23.12.4).
The procedure is as follows:
Including Source Terms
By default, the interphase momentum, , and sources are not included in the calculation. If you want to include any of these source terms, you can enable them using the multiphase-options command in the define/models/viscous/multiphase-turbulence/ text menu. Note that the inclusion of these terms can slow down convergence noticeably. If you are looking for additional accuracy, you may want to compute a solution first without these sources, and then continue the calculation with these terms included. In most cases these terms can be neglected.
Customizing the - Multiphase Turbulent Viscosity
If you are using the - multiphase turbulence model, a user-defined function can be used to customize the turbulent viscosity for each phase. This option will enable you to modify in the - model. For more information, see the separate UDF Manual. In the Viscous Model panel, under User-Defined Functions, select the appropriate user-defined function in the Turbulent Viscosity drop-down list.