Hello,
You are correct that nu_TLU represents the kinematic viscosity, and not the specific heat, in the two-phase fluid property file. Our documentation team has been made aware of this.
In the two-phase fluid domain, users must supply the fluid specific heat for both library and custom blocks. You can calculate it based on the Prandtl number in your system:
,where 
is the specific heat, μ is the dynamic viscosity, and k is the thermal conductivity. This should be defined for both the liquid and the vapor of the two-phase fluid.
is the specific heat, μ is the dynamic viscosity, and k is the thermal conductivity. This should be defined for both the liquid and the vapor of the two-phase fluid.Best,
Sarah
