# Solenoid force screening
# Scope: Ideal uniform air-gap magnetic force from supplied gap flux density.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

fluxDensity = 0.5 T
area = 100 mm^2
permeability = 0.0000012566370614 H/m

force := fluxDensity^2*area/(2*permeability) [N]

check force target: force >= 5 N

scenario alternative: fluxDensity = 0.4 T