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Data, software, and analytics

What is Meant by “Hydraulics at High d/D”?

Published January 29, 2026
A

What is Meant by “Hydraulics at High d/D”?

• In circular pipes, velocity at partial flow can exceed the full-flow velocity, with maximum velocity typically occurring around d/D ≈ 0.8.
• Discharge is not maximized at exactly full flow; for circular sections, maximum discharge usually occurs at about d/D ≈ 0.95.

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