Page 13 - TransAT_Tutorial_Manual

TransAT Tutorial Manual 1.1. Turbulent Channel Flow

Domain & Grid Tab
In this section the domain and the computational grid for the simulation will be defined.

• Select the Domain & Grid tab

• In the Domain section, set the following values for the domain boundaries:
X min [m] : 0.0
X max [m] : 1.0
Y min [m] : 0.0
Y max [m] : 0.1
Z min [m] : 0.0
Z max [m] : 0.01

• Set the following parameters to define the cell density and aspect ratios in the domain

Nx: 41
Cell Ratio : 1.0
Maximal Ratio : 1.0

Ny: 21
Cell Ratio : 1.0
Maximal r a t i o : 1.0
Nz : 2
Cell Ratio : 1.0
Maximal Ratio : 1.0

Ratios are set to 1.0 to create a uniform mesh.

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 di-
rection minus one.

Also note that TransAT is a three-dimensional solver. As a result, at least 1 cell (i.e. 2 nodes) is
required in the third dimension, even for two-dimensional or axisymmetrical problems.

Blocks
The domain must now be decomposed into several blocks so that the simulation can run on
several processors. Indeed, each block is allocated to one processor (but a processor can handle
several blocks).

• Select Blocks to define the multi-block option.

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