An interpolation (from file) function, or profile function, is a type of user function that provides access, from a CEL expression, to profile data based on a set of spatial coordinates.

Profile data is imported from an external data file (typically named with file extension .csv). You have the option of storing the data with the case or continuing to reference the external data file, in which case that file is read directly by the CFX-Solver each time the solver is started or restarted.

Applications of profile functions include: