Page 27 - TransAT_Tutorial_Manual

TransAT Tutorial Manual 1.2. Backward Facing Step

• In the Domain section, set the following values for the domain boundaries.
X min [m] : 0.0
X max [m] : 0.05
Y min [m] : 0.0
Y max [m] : 0.01
Z min [m] : 0.0
Z max [m] : 0.01

• Set the values of the grid parameters as follows to define the cell density in the domain and
the refinement zones.
Nx: 101 , Cell Ratio : 1.1 , Maximal Ratio : 6
Ny: 51 , Cell Ratio : 1.1 , Maximal Ratio : 6
Nz : 11 , Cell Ratio : 1.1 , Maximal Ratio : 6

Note that Nx, Ny, Nz are the number of corner points in the x, y and z directions. The actual
number of cells in each direction is the number of corner points in the corresponding direction
minus one.

Blocks

• Click the Blocks tab.
To create a step, the domain has to be split into 4 blocks which can be adjusted to a required
dimension.
• First, click

• Enter the following number of blocks in each direction in the corresponding fields
X d i r e c t i o n : 2
Y d i r e c t i o n : 2
Z d i r e c t i o n : 1

• Click to apply the block decomposition and close the block decomposition settings
window
A block can be selected with the Select Block field by choosing the appropriate block number.

• Select Block 1 then click

After the deletion operation, the numbering of the blocks will be automatically re-adjusted.

Now the dimensions of the three remaining blocks will be modified in the x-direction. To do
so

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