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Glossary · Friction & flow regimes
Hazen-Williams Friction Model
This friction loss model is applied to systems with liquid water or fluids having similar properties to water at 60°F, under turbulent flow conditions. It is particularly useful for modeling fire protection and closed-pipe irrigation systems.
∆ H= Factor∙L_e (100/C)^{1.85} Q^{1.85}/D^{4.8655}| ∆H | Frictional Head Loss |
| Le | Equivalent length |
| C | Hazen – Williams Friction Factor |
| D | Pipe Inside Diameter |
| Factor | Unit Conversion factor (Imperial, Metric or SI) |
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