Page 233 - TransAT_Tutorial_Manual

TransAT Tutorial Manual 5.3. Transport of particles in a pipe

• Select Blocks to define the multi-block option.

• Click to cut the domain into several computational blocks.

• Choose 3 for X direction then click

The domain is automatically cut into blocks of equivalent sizes.

BCs Tab
The BCs tab allows the user to assign boundary conditions for each of the surfaces present in
the domain. A list of the surfaces present in the domain can be seen by selecting All surfaces in
the drop-down menu. The appropriate setup for this simulation requires 2 boundary conditions
in total.

• Select the BCs tab

• One of each type of boundary condition are already available at the start.

• This tutorial will edit from the Inflow and Outflow and BCs available.

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

Lagrangian P a r t i c l e Tracking :
P a r t i c l e volume f r a c t i o n : 1.0 e−4
P a r t i c l e v e l o c i t y : u : 0.005 v : 0.0 w: 0.0
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

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Ascomp AG Switzerland 223 Version 5.7