UserDefinedIndices

As a postprocessing feature, users can define own indices. At the startup phase, MESHFREE scans the input file (USER_common_variables) for occurrences of indices of the forms: No matter, where it occurs or for what reason, MESHFREE will create this index as additional index. It is then treated like a usual MESHFREE index of the form %ind_...%.

Types of user defined indices

There are two types of indices and they differ in the way they are updated:

• %indU_...% are continuously evaluated indices; whenever a new point is created, its value for %indU_...% is interpolated from neighbor values.
• %indC_...% are discretely evaluated indices; whenever a new point is created or an inactive point is activated, its value for %indC_...% is inherited from the originating/closest point.

Assignment and usage

The user defined indices of the form %indU_...% can be used, especially, in the CODI- and EVENT-context. However, all other functionalities like INITDATA, SAVE_ITEM, RightHandSideExpression etc. work in the same way. The user defined indices of the form %indC_...% can be used in order to discretely colorize the simulation domain for analysis. In the %indU_...% case, this would smear out as the values would be interpolated.

Logging

The complete collection of indices and other MESHFREE variables of the form %...% can be found in the file Variables.log in the directory log_ . For an example, see tut3d_08.