Fluid
Use the Fluid node to define the density, dynamic viscosity, and heat convection and conduction properties.
Pressure Work
The Pressure Work section has an Include pressure work check box where a pressure work term can be activated. When checked a contribution to the right-hand side of the Heat Transfer in Pipes equation is added.
This term can be important to activate if the pressure drop is expected to be considerable and the fluid is compressible. The pressure-volume work is added to the energy balance.
For more information, see the section Theory for the Heat Transfer in Pipes Interface.
Fluid Properties
The default Density ρ and Dynamic viscosity is specified here.
Heat Convection and Conduction
The default Heat capacity at constant pressure Cp (SI unit: J/(kg·K)), Ratio of specific heats γ (dimensionless), and Thermal conductivity k (SI unit: W/(m·K)) all use values From material. For User defined enter different values or expressions.