Page 85 - TransAT_Tutorial_Manual

TransAT Tutorial Manual 2.3. Flow in an obstructed pipe

Now conditions for each of the boundaries should be set.

• For each boundary condition, press to open the parameters window, set the parameters
listed below then click .
Inflow −> Basic Properties :
Inflow Type : Velocity based
Inflow P r o f i l e : Laminar
Inflow Velocity component (u ) : 0.005

Outflow −> Outflow Type : Pressure
Outflow Data Source : From Boundary conditions
Outflow Pressure : 0 Pa

To assign the Inflow boundary condition to the XMIN 0 surface

• Click the face XMIN 0 in the surface tree

• Select the Inflow boundary condition by ticking the light grey square to the left in the
appropriate line of the boundary conditions table

• Press . The XMIN 0 face will now be highlighted in both the surface list and the graphical
viewer.

• Proceed similarly using the data in the following table to assign the other boundary condi-
tions to their respective faces.

Boundary XMIN 0: Inflow
Boundary XMAX 0: Outflow

Symmetry conditions are applied on the remaining boundary surfaces. Since undefined boundaries
are set to symmetry by default in TransAT, no extra operation is required to define the remaining
boundary conditions. The final setup should be similar to Figure 2.9

• Click Files then select Save to save the settings. Alternatively, you can press Ctrl+s to
save the settings.

2.3.8 Input Tab

To set up the simulation parameters

• Select Input at the top of TransATUI

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