Page 412 - TransAT_Tutorial_Manual

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

10.2.5 Mesh & BCs Tab

The domain is defined and the mesh is created in the Mesh & BCs 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 located in the sub-window on the left-hand side.

• In the Domain section, set the domain boundaries as follows
X min : 0.0
X max: 0.1
Y min : 0.0
Y max: 0.1
Z min : −0.0005
Z max: 0.0005

The number of cells in the domain and the refinement zones are defined in the Domain & Grid
tab
• Modify the fields defining the grid with the values given below to define the number of cells
of the mesh
Nx: 81 , Cell Ratio : 1.0 , Maximal Ratio : 1
Ny: 81 , Cell Ratio : 1.0 , Maximal Ratio : 1
Nz : 2 , Cell Ratio : 1.0 , Maximal Ratio : 1

In this case, the mesh is uniform: ratios between cells are set to 1.

Blocks
The domain will now be decomposed into several blocks, so that the simulation can run in
parallel with a maximum number of processors equal to the number of blocks.

• Select the Blocks tab

• Click
• Enter the number of blocks in the different directions as follows then click

X d i r e c t i o n : 2
Y d i r e c t i o n : 2

The domain is automatically split into blocks of equivalent sizes.

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Ascomp AG Switzerland 402 Version 5.7