Page 355 - TransAT_Tutorial_Manual

TransAT Tutorial Manual 9.1. Water suction

9.1.5 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: 0.5
Y min : 0.0
Y max: 0.3
Z min : 0.0
Z max: 0.001

The grid properties will now be set

• Modify the fields defining the grid with the values given below to define the number of cells
of the mesh

Nx: 26 , Cell Ratio : 1.0 , Maximal Ratio : 1
Ny: 31 , 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 grid will now be split into 4 blocks so the simulation can run on up to 4 processors.

Please note: one processor can handle one or several blocks. Also note that an optimal load
balance has 1 block per processor with blocks of equal edge length (in terms of cells). For the
current 2D setup, this means splitting the domain in x- and y-direction.

• Select Blocks to define the multi-block options

• Click to cut the domain into several computational blocks

• Set the number of blocks in both the X direction and the Y direction to 2.
• Click

The domain is automatically cut into 4 blocks of equivalent number of cells.

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Ascomp AG Switzerland 345 Version 5.7