Automatic Group Definition

SIMULIA Tosca Fluid automatically defines certain groups that can be used in commands that operate on groups within the parameter file.

This page discusses:

The following tables explain the groups and their naming convention.

Note: All automatically generated groups can be used in the parameter file.

General Groups

General groups are groups that are generated automatically from all CFD models.

Group Name

Type

Explanation

ALL_CELLS

cells

The group ALL_CELLS contains all fluid cells in the CFD model.

Groups from FLUENT® Models

Group Name

Type

Explanation

<cell_zone_id>_<label>

Examples:

2_MY_CELLS

4_CELL_GROUP

cells

Optional: If the CFD model contains fluid cells in multiple cell zones, one cell group is defined for the cells in each zone.

The cell groups are named according to the cell zone IDs and labels used in the FLUENT® case file.

Example:

FLUENT: cell zone ID 3, „my_fluid“ --> SIMULIA Tosca Fluid: cell group 3_MY_FLUID.

Note: If no label is given, „CELL_GROUP“ is added to the ID.

<boundary_zone_id>_ <label>

Examples:

2_MY_OUTLET

4_CELLFACE_GROUP

cellfaces

Cell face groups are created for boundary zones in the CFD model. For each boundary zone, a cellface group is defined containing the cell faces that make up the boundary zone.

The cellface groups are named according to the face zone IDs and names used in the FLUENT® case file.

Example:

FLUENT: face zone ID 4, „my_outlet“ --> SIMULIA Tosca Fluid: cellface group 4_MY_OUTLET

Note: If no label is given, „CELLFACE_GROUP“ is added to the ID.

Example: The group of a FLUENT® boundary zone can be used as boundary in SIMULIA Tosca Fluid. The zone name and zone ID can be derived from the Boundary Conditions dialog in FLUENT® as depicted in the following figure:



For example, the boundary zone „OUT1“ with zone ID 5 is addressed in SIMULIA Tosca Fluid as follows: 

<DRESP>
  <ID_NAME>MY_DRESP</ID_NAME>
  <INFLOW>4_IN</INFLOW>
  <OUTFLOW>5_OUT1</OUTFLOW>
  <TYPE>BACKFLOW</TYPE>
</DRESP>

In this example, the FLUENT® boundary region named „OUT1“ is assigned to a SIMULIA Tosca Fluid design response as OUTFLOW.

Groups from STAR-CCM+® Models

Group Name

Type

Explanation

<cell_zone_id>_<label>

Examples:

2_MY_CELLS

4_CELL_GROUP

cells

The cell groups are named according to the cell zone IDs and labels used in the STAR-CCM+® simulation file.

Example:

STAR-CCM+: cell zone ID 3, „my_fluid“ --> SIMULIA Tosca Fluid: cell group 3_MY_FLUID.

<boundary_zone_id>_ <label>

Examples:

2_MY_OUTLET

4_CELLFACE_GROUP

cellfaces

Cell face groups are created for boundary zones in the CFD model. For each boundary zone, a cell face group is defined containing the cell faces that make up the boundary zone.

The cell face groups are named according to the face zone IDs and names used in the STAR-CCM+® simulation file.

Example:

STAR-CCM+: face zone ID 4, „my_outlet“ --> SIMULIA Tosca Fluid: cellface group 4_MY_OUTLET

Example: The group of a STAR-CCM+® boundary zone can be used as boundary in SIMULIA Tosca Fluid. The zone name and zone ID can be derived from the Objects tree-view in STAR-CCM+® as shown in the figure below:



For example, the boundary zone „out2“ with zone ID 9 is addressed in SIMULIA Tosca Fluid as follows: 

<DRESP>
  <ID_NAME>MY_DRESP</ID_NAME>
  <INFLOW>8_IN</INFLOW>
  <OUTFLOW>9_OUT2</OUTFLOW>
  <TYPE>BACKFLOW</TYPE>
</DRESP>

In this example, the STAR-CCM+® boundary region named „out2“ is assigned to a SIMULIA Tosca Fluid design response as OUTFLOW..