# Magnetic-circuit reluctance
# Scope: Uniform linear core reluctance; supplied relative permeability, no saturation/fringing.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

length = 100 mm
area = 100 mm^2
relativePermeability = 1000
turns = 100
current = 0.1 A
muZero = 0.0000012566370614 H/m

reluctance := length/(muZero*relativePermeability*area) [A/Wb]
flux := turns*current/reluctance [Wb]
density := flux/area [T]

check flux density screen: density <= 0.3 T

scenario alternative: length = 80 mm