Calculations
Recommendations
Circular weirVelocity gradient in pipes and circular orificesHazen-Williams equation head lossWashing water collector gutterVelocity gradient to Parshall meterDarcy-Weisbach formula for head loss in water
Input data
Flow
Temperature
Diameter
Length
Equivalent roughness
Roughness multiplier
Output data
Head loss
Input data
Flow
Temperature
Length
Equivalent roughness
Roughness multiplier
Output data
Input data
Flow
Diameter
Temperature
Equivalent roughness
Roughness multiplier
Output data
Input data
Flow
Diameter
Length
Temperature
Roughness multiplier
Output data
Input data
Diameter
Length
Temperature
Equivalent roughness
Roughness multiplier
Output data
Description
Calculate the head loss in water flowing through pipes using the Darcy-Weisbach formula and the Churchill correlation for determining the friction factor.
There are 5 calculation possibilities:
- Calculate head loss
- Calculate diameter
- Calculate pipe length
- Calculate equivalent roughness
- Calculate flow rate
Darcy
Input and Output Parameters
Input Data
Parameter | Standard Units | Description |
|---|---|---|
Flow | m³/s | Water volumetric flow rate |
Temperature | °C | Water temperature |
Diameter | m | Internal pipe diameter |
Length | m | Pipe length |
Equivalent roughness | mm | Pipe surface roughness |
Roughness multiplier | - | Adjustment factor for roughness |
Output Data
Parameter | Standard Units | Description |
|---|---|---|
Head loss | m | Total head loss |
Diameter | mm | Calculated internal pipe diameter |
Length | m | Required pipe length |
Equivalent roughness | mm | Calculated surface roughness |
Flow | m³/s | Calculated water flow rate |
References
- CHURCHILL, Stuart W. (1977). Friction-factor equation spans all fluid-flow regimes. Chemical engineering, Nov.