Page 106 - TransAT_Tutorial_Manual

TransAT Tutorial Manual 3.2. Natural Convection in a Closed Cavity

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 heated wall is at X min, a cold wall at X max, walls with zero heat flux at Y
min and Y max and symmetry boundary conditions at Z min and Z max. Below step-by-step
instructions are given to create the hot wall boundary condition and define its properties.

• Rename the Wall BC to hotwall

• Ensure the type is set as Wall in the drop-down list of the Type column

• 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: 315.0

• Click to save the settings and close the window

• Click to create a second Wall BC and rename it to coldwall
• Ensure the type is set as Wall and then click to set the properties

• Several wall BCs can be created as following:

Name: coldwall
Type : Wall
Basic :
− Temperature / Heat f l u x choice : Temperature
− Temperature / Heat f l u x value : 285.0

Name: noheatfluxwall
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

c
Ascomp AG Switzerland 96 Version 5.7