Page 58 - TransAT_Tutorial_Manual

TransAT Tutorial Manual 2.1. Block Mesh Refinement: Flow over Cylinder (Re=150)

2.1.6 Cylinder flow using a body fitted grid

2.1.6.1 Creating the project

Please note: It is important to save different projects in different folders, because results will
always be stored in a sub-folder called RESULT. The template will be used for several grids.

• Click Files then select Open Project. Alternatively, press Ctrl+o.

• Select cylinder template.stt.

The Execute tab is automatically opened.
• Click Files then select Save As. Alternatively, press Ctrl+Shift+s.

• Click to select the folder where the project will be saved

• Create a new directory by clicking the icon

• Set a name for the new directory, say multiblock.

• Set a name to the project (cylinder mb for instance) then click .

2.1.6.2 Mesh & BCs Tab

Domain & Grid

• Click Mesh & BCs at the top of TransATUI, then select Domain & Grid.
• Set the general properties of the mesh (the number of cells in each direction domain and
the refinement zones of the main grid) as follows
Nx: 69 , Cell Ratio : 1.10 , Maximal Ratio : 6
Ny: 49 , Cell Ratio : 1.10 , Maximal Ratio : 6
Nz : 2 , Cell Ratio : 1.00 , Maximal Ratio : 1

Note that Nx is the number of corner points meaning that the actual number of cells is Nx - 1.

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

• Select the Blocks tab

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