• Dispersed Phase in the theory section.

See Also

D E P E N D E N T V A R I A B L E S

The dependent variables (field variables) are for the Velocity field, continuous phase;

Velocity field, dispersed phase, Pressure and Volume fraction, dispersed phase. The names can be changed but the names of fields and dependent variables must be unique within a model.

C O N S I S T E N T S T A B I L I Z A T I O N

To display this section, click the Show button () and select Stabilization.

Select Streamline diffusion to activate GLS streamline diffusion for all dependent variables. Select Crosswind diffusion to activate crosswind diffusion for all variables. The

crosswind diffusion has three tuning parameters. Ck,NS,c controls the amount of crosswind diffusion for the momentum equations of the continuous phase. Ck,NS,d

controls the amount of crosswind diffusion for the momentum equations of the

dispersed phase and Ck,NS,d controls the amount of crosswind diffusion for the dispersed phase transport equation. All of these should be in the order of unity Ref. 2,

but can be tuned for optimal performance.

I N C O N S I S T E N T S T A B I L I Z A T I O N

To display this section, click the Show button () and select Stabilization.

Inconsistent stabilization can be activated independently for the momentum equations for the continuous phase, the momentum equations for the dispersed phase and for the dispersed phase transport equation respectively by selecting the corresponding check box. Each inconsistent stabilization contribution has a tuning parameter.

	• Preconditioners for Iterative Solvers
See Also	• Isotropic Diffusion

D I S C R E T I Z A T I O N

To display this section, click the Show button () and select Discretization.

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The Euler-Euler Two-Phase Flow interface supports three levels of basis functions: P1+P1 (the default option), P2+P1, and P3+P2. These all represent Lagrangian basis

functions of different orders:

•P1+P1 – Linear basis functions for all degrees of freedom. Linear basis functions are computationally less expensive than the higher-order options and are also more robust. This option requires that Streamline diffusion is activated for both sets of momentum equations.

•P2+P1 – Quadratic basis functions for all degrees of freedom except the pressure which is described by linear basis functions. Higher order elements, as compared to linear elements, are a computationally effective way to obtain a high accuracy but only if the flow is well resolved. This requirement is most likely to be met for flows with very low velocities.

•P3+P2 – Cubic basis functions for all degrees of freedom except the pressure which is described by quadratic basis functions. Computationally very expensive and the least robust option but also the option that has the highest formal accuracy.

•Model Builder Options for Physics Feature Node Settings Windows

•Domain Conditions for the Euler-Euler Model, Laminar Flow Interface

	See Also	• Boundary, Point, and Pair Conditions for the Euler-Euler Model,
		Laminar Flow Interface
		• Theory for the Euler-Euler Model, Laminar Flow Interface

Domain Conditions for the Euler-Euler Model, Laminar Flow Interface

The Euler-Euler Model, Laminar Flow Interface domain conditions are described in this section:

•Phase Properties

•Initial Values

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