Petukhov Friction

fullflow.PetukhovFriction

Petukhov smooth-pipe turbulent Darcy friction factor correlation.

PetukhovFriction computes a Darcy friction factor from mass flow, viscosity, hydraulic diameter, and flow area. Laminar flow uses a Poiseuille-number fallback, while turbulent flow uses the Petukhov smooth-pipe correlation.

Parameters

Name	Type	Description
name	str	Component name
network	Network	Network that owns this component
mass_flow	State	Fluid mass flow rate. The absolute value is used
friction_factor	State	Output Darcy friction factor
hydraulic_diameter	State or float	Hydraulic diameter
dynamic_viscosity	State	Fluid dynamic viscosity
cross_sectional_area	State or float	Flow cross-sectional area
poiseuille_number	float, optional	Poiseuille number used for laminar flow
reynolds_number	State or float, optional	Output Reynolds number
reynolds_number_threshold	State or float, optional	Reynolds number threshold for laminar fallback

Outputs

Name	Type	Description
friction_factor	State	Darcy friction factor
reynolds_number	State or float, optional	Reynolds number