Step 5: Phases

Phases

  In the following steps, you will define water as the secondary phase. When you define the initial solution, you will patch water in the nozzle region. In general, you can specify the primary and secondary phases whichever way you prefer. It is a good idea to consider how your choice will affect the ease of problem setup, especially with more complicated problems.

1.   Specify air ( air) as the primary phase.

Phases phase-1 - Primary Phase Edit...

(a)   Enter air for Name.

(b)   Retain the default selection of air in the Phase Material drop-down list.

(c)   Click OK to close the Primary Phase dialog box.

2.   Specify water ( water-liquid) as the secondary phase.

Phases phase-2 - Secondary Phase Edit...

(a)   Enter water-liquid for Name.

(b)   Select water-liquid from the Phase Material drop-down list.

(c)   Click OK to close the Secondary Phase dialog box.

3.   Specify the interphase interaction.

Phases Interaction...

(a)   Enable Wall Adhesion so that contact angles can be prescribed.

(b)   Click the Surface Tension tab.

  The surface tension coefficient inputs will be displayed.

i.   Select constant from the Surface Tension Coefficient drop-down list.

ii.   Enter 73.5 dyn/cm for Surface Tension Coefficient.

(c)   Click OK to close the Phase Interaction dialog box.