Flow Continuity

The Flow Continuity feature can be added to assembly pairs. It prescribes that the flow field is continuous across the pair. The Flow Continuity is only suitable for pairs where the boundaries match.

B O U N D A R Y S E L E C T I O N

From the Selection list, choose the boundaries for the selected pairs.

P A I R S E L E C T I O N

When Flow Continuity is selected from the Pairs menu, choose the pair to define. An identity pair has to be created first. Ctrl-click to deselect.

This boundary condition is not available if the Use memory-efficient form check box is selected (click the Show button () and select Advanced Physics Interface Options>Advanced Settings to display the section) on any

Note

single-phase flow interface Settings page.

Pressure Point Constraint

The Pressure Point Constraint feature adds a pressure constraint at a point. If it is not possible to specify the pressure level using a boundary condition, the pressure must be set in some other way, for example, by specifying a fixed pressure at a point.

P O I N T S E L E C T I O N

From the Selection list, choose the points to use a pressure constraint.

P R E S S U R E C O N S T R A I N T

Enter a point constraint for the Pressure p0 (SI unit: Pa).

C O N S T R A I N T S E T T I N G S

To display this section, click the Show button () and select Advanced Physics Interface Options. Select the Use weak constraints check box to use weak constraints and create dependent variables for the corresponding Lagrange multipliers.

B O U N D A R Y C O N D I T I O N S F O R T H E S I N G L E - P H A S E F L O W I N T E R F A C E S | 133