Use the Heat Transfer node to define the tangential velocity, density, dynamic viscosity, and heat convection and conduction properties.

The default Density ρ (SI unit: kg/m3) uses the value From material. For User defined enter a different value or expression.

The default Dynamic viscosity μ (SI unit: Pa·s) uses the value From material and describes the relationship between the shear rate and the shear stresses in a fluid. Intuitively, water and air have a low viscosity, and substances often described as thick (such as oil) have a higher viscosity.

Select an option from the Tangential velocity list — User defined, Tangential velocity (nipfl/nipfl), or Tangential velocity (pfl/pfl). For User defined enter a value for the Tangential velocity u (SI unit: m/s).

The default Density ρ (SI unit: kg/m3), Dynamic viscosity μ (SI unit: Pa·s), 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.