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Pressure Drop — Darcy–Weisbach
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ΔP = f · (L/D) · (ρ v² / 2)
Pipe length — L (m)
Diameter — D (m)
Density — ρ (kg/m³)
Velocity — v (m/s)
Friction factor — f (leave empty to compute)
Pipe absolute roughness — ε (m, optional)
Dynamic viscosity — μ (Pa·s) — required if friction not provided
Calculate Pressure Drop
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