Moody Diagram — Pipe Flow

Darcy-Weisbach friction factor f vs Reynolds number Re, across laminar, transitional, and turbulent regimes. Drag your point on the diagram.

Re = 10000
ε/D = 0.001
f = —
Laminar (Re<2300): f=64/Re. Colebrook-White (turbulent): 1/√f = −2log(ε/3.7D + 2.51/(Re√f)). Fully rough: 1/√f = −2log(ε/3.7D). Smooth pipe: 1/√f = −2log(2.51/(Re√f)). Transition zone ~2300–4000.