Page 273 - TransAT_Tutorial_Manual

TransAT Tutorial Manual 6.2. countercurrent

• In the equation tree, click All Quantities. The parameters of all the highlighted equations
will be modified.

• Modify the parameters besides the equation tree as follows

Convergence Tolerance : 1e−2

• In the equation tree, click Level-set. Set as follows

Convection scheme : Quick

Initial conditions
It is necessary to initialise the simulation, in order to give the initial location of the different
phases. In the Initial Conditions tab, the initial conditions for the simulation are set. In this
tutorial advanced initial conditions are used.

The initial velocity can be defined in a C++ file initialconditions.cxx. A template of an
initial condition file can be found in the reference folder (Tutorials/countercurrent flow in TransAT
folder).

• Copy the initial conditions file to your project folder by executing the following command
in a terminal

• Copy the file initialconditions.cxx from the subfolder Tutorials/7.2 - countercurrent flow of
the Public/Documents/TransAT5.7 folder to your project folder.

• Select Advanced Initial Conditions

• Click to compile the initial conditions. This step is optional and only checks that
the initialcondition.cxx file is written properly and can be compiled. The flow field will be
initialised later in the Execute window.

Output Management
The parameters of the outputs of the simulation are set in the Output Management tab. In
this example, only the visualization output will be defined.

• Click Output Management on the left-hand side of the TransATUI

• Activate the following variables in the Output Variables window then click to save the
settings and close the window

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