AcFlux Interface

Solver AcFlux
Type of mesh unstructured mesh (hexahedra elements only)
Dimension 3D



The translator creates a grid and boundary conditions file in the AcFlux file format.

Creating the AcFlux Input File

The AcFlux output interface can be invoked from the AI Environment.  Under the menu "Output", "Select solver", select "AcFlux".  Then select "Write input".   A window opens to allow the specification of the files to be translated into the AcFlux format.  First, an unstructured mesh file must be selected.     In addition, the output interface requires the boundary conditions file, and offers the option to define the name of the AcFlux input file.  The interface generates the AcFlux input file in the current project directory.

Defining boundary conditions and properties for AcFlux

After generating the mesh, and prior to running the translator, boundary conditions and properties for AcFlux can be defined using the AcFlux  Graphical User Interface.  Under the menu "Output", "Select solver", select "AcFlux".   Then select "Boundary Conds" and the current boundary condition file to edit (default is "family_boco.fbc" or "project.fto").   The "Family Boundary Conditions" window opens allowing to set the boundary conditions and properties on the mesh families. The program supports the definition of model unit, regions, boundary types, radiation panel and contrained grid data.

Model unit

The model unit needs only to be specified once, on any of the domains or families of the model. The default model unit name is 'MM'.


The region numbers are optionally defined on each domain or 3D family. The regions are defined by specifying the following data:

The default value for all these variable is set to one.

Boundary types

The boundary types can be defined on subfaces or 2D families.  The valid boundary types are:

The boundary region numbers (IRB) must also be defined. For cyclic boundaries, two distinct IRB must be given, one for each side of the periodicity.

Radiation panel number

The radiation panel number can be set on boundary surfaces. It should be set to a positive integer.
If undefined, the radiation panel number is set to one by default.

Constrained Grid Data

This condition allows to specify constrains on vertices. It must be defined on node families.  An optional "ranking number" can be specified.  The "constrained grid data" (CG) are written to the AcFlux file in the order given by the ranking number.