[Laithz]

Hi,

I am trying to define the heat transfer coefficient in field functions in a cylindrical pipe with a constant surface temperature(400).
I only want to consider the center line temperature, but its not getting compiled.{volume average1} is my bulk temperature.
Here is the function:
(${Temperature}[0]==0 && ${Temperature}[1]==0) ? ${HeatTransferCoefficient} : (${ThermalConductivity}*(400-${Temperature}))/((400-${Volume Average 1})*0.25)

Thanks,
LZ