Page 356 - TransAT_Tutorial_Manual

TransAT Tutorial Manual 9.1. Water suction

Figure 9.2: Block decomposition

BCs Tab
The boundary conditions must now be set for this case.

• Select BCs tab.
To see the surfaces of all or each of the boundaries, choose a boundary in the drop-down list at
the top of the BCs tab. One boundary condition of each type is available to be edited and used
from the start. Additional BCs can be created by clicking on . is used to assign a selected
BC to a highlighted surface.

Creating Boundary Conditions:
In this case wall boundary conditions are applied at the X min, X max and Y min surfaces. A
pressure outflow is prescribed at the Y max surface and symmetry conditions are applied on the
Z min and Z max surfaces. Below, step-by-step instructions are given.

• From the Outflow BC available, click to set the properties of the boundary condition

• Set the following properties in the different tabs of the outflow properties window
General tab :
− Outflow Type : Pressure
− Outflow Data Source : From I n i t i a l Conditions

Backflow p r o p e r t i e s tab :
− Backflow Volume Fraction of Phase 1: 0
− Backflow Volume Fraction of Phase 2: 1
− Backflow turbulence i n t e n s i t y : 0.1
− Backflow eddy v i s c o s i t y r a t i o : 100

• Click to save the settings and close the window

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