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TransAT Tutorial Manual 10.3. Droplet Impact on a Flat Plate

10.3.5 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: 0.005
Y min : 0.0
Y max: 0.004
Z min : −1e−5
Z max: 1e−5

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: 38 , 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.

BCs Tab
The boundary conditions must now be set for this case.

• Select BCs tab.

To see the surfaces of all or each of the boundaries, choose a boundary in the drop-down list at
the top of the BCs tab. One boundary condition of each type is available to be edited and used
from the start. Additional boundary conditions can be created by clicking on . is used to
assign a selected BC to a highlighted surface.

Creating Boundary Conditions:

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