# Flow rate, velocity and pipe area
# Scope: Uniform mean speed through a circular cross-section.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

flow = 10 L/min
diameter = 20 mm

area := pi*diameter^2/4 [m^2]
velocity := flow/area [m/s]

check velocity budget: velocity <= 1 m/s

scenario alternative: flow = 8 L/min