# Laminar capillary flow
# Scope: Hagen-Poiseuille circular pipe, fully developed laminar Newtonian flow.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

diameter = 5 mm
length = 1 m
viscosity = 0.001 Pa*s
flow = 0.1 L/min
density = 1000 kg/m^3

pressureDrop := 128*viscosity*length*flow/(pi*diameter^4) [Pa]
reynolds := 4*density*flow/(pi*diameter*viscosity)

check laminar applicability: reynolds < 2300

scenario alternative: diameter = 4 mm