Using Tools > Using Field Functions > What Are Field Functions? > What Are User Field Functions?

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What Are User Field Functions?

User field functions are field functions that you create to access field data, and share a particular set of properties. They may be either a scalar or a vector. They are created manually and are defined in terms of other field functions.

User-Defined Field Function Properties

Dimensions

The physical dimensions of this field function, which you can customize.

     

Type

The type of field function: scalar or vector.

Expert Properties

Assembly Code

An unambiguous tree-based (but humanly readable) form of the field function formula (read-only). Empty until the Definition is entered or until the field is used, for example in a contour plot. The assembly code will be updated each time you change the Definition and press <Enter>. This can be useful to ensure that STAR-CCM+ will interpret your definition as expected (for example, operator precedence).

     

Definition

The formulation of this field function using the special STAR-CCM+ field function syntax. Entering an invalid definition will cause the error: Error compiling Field Function: parse error to be displayed in the Output window, and the Assembly Code property to be populated with error.

     

Function Name

The name of this field function. Use this property in the definition of other field function definitions, not the node name. Use this property to remind you of the actual field function if you have renamed the node in the tree.

     

Ignore Boundary Values

Determines whether the field functions will be computed based on the data stored in the cells adjacent to the boundaries rather than the field data stored on boundaries (if available).

 

Ticked

Use adjacent cell values.

 

Cleared

Use boundary values.

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