Reply To: UDF for variable mass flow inlet

[Rob]

I've never seen CURRENT_TIME used like that, read this  https://ansyshelp.ansys.com/account/Secured?returnurl=/Views/Secured/corp/v241/en/flu_udf/flu_udf_RPVariables.html  

We tend to base any boundary conditions on the flow time, and if you need to alter the boundary value use time not time step.