Page 95 - TransAT_Tutorial_Manual

TransAT Tutorial Manual 3.1. Forced Convection in a Channel with Heated Walls

• Click to select the folder and close the browser

• Set Project Name to a more explicit name such as forcedconvection then click

After clicking , the Mesh & BCs tab will be opened.

The Geo, Mesh & BCs, Input and Execute tabs at the top of the TransATUI window can
now be selected to open the modules to set up a simulation with TransAT.

3.1.5 Mesh & BCs Tab

The domain is defined and the mesh is created using this tab.

• If that is not already the case, select the Mesh & BCs tab at the top of the TransATUI
window

Domain & Grid
In this section the domain and the computational grid for the simulation will be defined.
• Select the Domain & Grid tab in the sub-window in the sub-window on the left

• In the Domain section, set the domain boundaries as follows

X min : 0.0
X max: 0.1
Y min : 0.0
Y max: 0.01
Z min : 0.0
Z max: 0.001

• Set the following parameters to define the number of cells in the domain and the refinement
zones.

Nx: 201 , Cell Ratio : 1.0 , Maximal Ratio : 1
Ny: 21 , Cell Ratio : 1.10 , Maximal Ratio : 6
Nz : 2 , Cell Ratio : 1.0 , Maximal Ratio : 1

To get higher resolutions in regions such as boundary layers, refinements zones can be created
using the Customized Refinement feature of TransAT. In this case, the grid is refined in the vicinity
of the top and bottom walls as follows:

• Check Customized Refinement in the Refinement Type section

• Select Y-axis then click to create a new refinement zone at the bottom of the channel.

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