[Fabixeneize]

Hello,

I'm trying to use lambda ci method to visualize vortexes on Tecplot, and I'm having some trouble with the expresion to calculate lambda Ci with Tecplots macro. One of the reasons is that my tecplot version, 360 2012R1 is not compatible with functions as "IF"

The macro reads for lci (lambda ci)

$!ALTERDATA EQUATION = '{lci} = IF ({Beta}<=0, -1 , (sqrt(3)/2)*((abs({Beta}))**(1/3) + {Q}/3 * (abs({Beta}))**(-1/3) ))'

The syntax of the expression is
{Result} = IF(Condition, expression if true, expression if false)

But would it really be -1?

Thanks for your help

[FMDenaro]

why are you using macros? I remember that Tecplot has already the lamba-2 method implemented...

[Fabixeneize]

I think is because of the version of Tecplot I'm using.

[FMDenaro]

Well, I would code in fortran the evaluation of the lambda2 function, then write data in a file and load it in tecplot to see the iso-surfaces