functionlaminarTurbulentPressureLossHaaland

Pressure loss function (Haaland 1983) for laminar, transient and turbulent flow regimes

Extends from Internal.FlowResistance.partialPressureLoss (Partial pressure loss function).

Information

Pressure loss after Darcy–Weisbach, for laminar, (transient?) and turbulent flow.

The friction factor is based on Haaland 1983.

Haaland, S. E. Simple and Explicit Formulas for the Friction Factor in Turbulent Pipe Flow. Journal of Fluids Engineering 105, 89-90; 10.1115/1.3240948 (1983).

Inputs

TypeNameDefaultDescription
SI.MassFlowRatem_flow (from partialPressureLoss)Mass flow rate
SI.Densityrho (from partialPressureLoss)Density
SI.DynamicViscositymu (from partialPressureLoss)Dynamic viscosity
SI.Lengthr (from partialPressureLoss)Radius
SI.Lengthl (from partialPressureLoss)Length
SI.ReynoldsNumberRe_laminar2000Upper limit for laminar flow (Reynolds number)
SI.ReynoldsNumberRe_turbulent4000Lower limit for turbulent flow (Reynolds number)
Realshape_factor64Laminar pressure loss factor (Hagen-Poiseuille)
Realn1Transition coefficient (see documentation)
SI.Lengthks_input1e-7Surface roughness
ThermofluidStream.Processes.Internal.MaterialmaterialThermofluidStream.Processes.Internal.Material.otherMaterial of pipe

Outputs

TypeNameDefaultDescription
SI.PressureDifferencepressureLoss (from partialPressureLoss)pressure loss (dp)