Colebrook Friction Loss Formula for Round Ducts In the region of laminar flow (Reynolds numbers less than 2300),the friction factor is a function of Reynolds number only. For completely turbulent flow (fully rough), the friction factor depends on duct surface roughness and internal protuberances (...
frequency-independent series inductance from the current-sheet coil geometrical formula, corrected for field non-uniformity and round wire1,3–6 µH series AC resistance of the round wire coil at the design frequency Ω parallel stray capacitance at the design frequency, from Corum’s sheath he...
In the next example, the effect of spacing between busbars in a three-phase busduct with round conductors is considered for typical wire materials and heat transfer coefficients. Two typical materials were taken into account: copper ( σ = 55 MS / m , μ r = 1 , λ = 360 W / mK )...