Page 413 - TransAT_Tutorial_Manual

TransAT Tutorial Manual 10.2. Natural Convection in a Square Cavity at Ra = 10 6

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, a hot wall is located on X min surface, a cold wall on the X max surface and insulated
walls on the Y min and Y max surfaces. Symmetry conditions are applied on the Z min and Z max
surfaces. Below step-by-step instructions are given to create the hot wall boundary condition and
define its properties.

• Rename the Wall BC to hot wall

• Click to set the properties of the boundary condition
• Fill in the wall properties - Tab: Basic

– Temperature / Heat Flux Choice: Temperature
– Temperature / Heat Flux Value: 310.0

• Click to save the settings and close the window

• A second wall BC will be created by clicking , and naming it to cold wall

• Click to set the properties of the cold wall
• This and the other BCs should have the following settings:

Name: c o l d w a l l
Type : Wall
Basic :
− Temperature / Heat f l u x choice : Temperature
− Temperature / Heat f l u x value : 290.0

Name: i n s u l a t e d w a l l
Type : Wall
Basic :
− Temperature / Heat f l u x choice : Heat Flux
− Temperature / Heat f l u x value : 0.0

Name: symmetry
Type : Symmetry

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