A user function can be used in CEL expressions in any place
that a standard CEL function (for example, sin, cos, step, and so
on) can be used. For a user function with the Interpolation
(Data Input) option selected, you can enter an expression
using the following notation:
1D interpolation
<Function Name>(arg1[units])
3D interpolation
<Function Name>(arg1[units], arg2[units], arg3[units])
When using a system variable, an expression, or a value, you do not need to specify units. For example, a pipe inlet velocity profile might be set by entering:
inletvelocity( r)
or
inletvelocity( x, y, z)