# Pipe pressure drop
# Scope: Darcy-Weisbach straight-pipe loss; Darcy friction factor supplied.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

length = 10 m
diameter = 20 mm
flow = 10 L/min
density = 1000 kg/m^3
darcyFactor = 0.03

velocity := 4*flow/(pi*diameter^2) [m/s]
loss := darcyFactor*length/diameter*density*velocity^2/2 [Pa]

check pressure loss budget: loss <= 5000 Pa

scenario alternative: length = 8 m