# Pipe-flow Reynolds number
# Scope: Pipe Reynolds number for incompressible Newtonian fluid.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

flow = 1 L/min
diameter = 10 mm
density = 1000 kg/m^3
viscosity = 0.001 Pa*s

velocity := 4*flow/(pi*diameter^2) [m/s]
reynolds := density*velocity*diameter/viscosity

check laminar example: reynolds < 2300

scenario alternative: flow = 0.8 L/min