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Pipe Fittings: Elbow, 90°, (r/D = 4)
Pipe fittings loss coefficients — Darby 3K method K-factors for elbows, tees, valves, and other fittings
| fitting type | K1 (dimensionless) | K ref (dimensionless) | Kd (dimensionless) | Ki (dimensionless) | category | description |
|---|---|---|---|---|---|---|
| Elbow, 90°, (r/D = 4) | 800 | 0.283074 | 3.9 | 0.066 | Elbow | Darby 3K: K = 800.0/Re + 0.066*(1 + 3.9/D^0.3) |
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