Churchill

fullflow.Churchill

Churchill Darcy friction factor correlation.

Churchill computes a Darcy friction factor from mass flow, viscosity, hydraulic diameter, flow area, roughness, and Poiseuille number. The Churchill correlation provides a smooth transition across laminar, transitional, and turbulent Reynolds numbers.

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
roughness	State or float, optional	Absolute wall roughness
poiseuille_number	float, optional	Poiseuille number used for incompressible laminar flow
reynolds_number	State or float, optional	Output Reynolds number

Outputs

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