Karthik R
Administrator
Hello,nIf you are using one of the recent versions of Fluent, you don't need a UDF for this. You can do this using Fluent Expression. Please take a look at the link below for the details.nhttps://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v211/en/flu_ug/flu_ug_expression_syntax.htmlnKarthikn