Calculations
Darcy-Weisbach formula for head loss in water
Input data
Flow
Temperature
Diameter
Equivalent roughness
Roughness multiplier
Output data
Input data
Flow
Head loss
Temperature
Equivalent roughness
Roughness multiplier
Output data
Input data
Flow
Diameter
Head loss
Temperature
Equivalent roughness
Roughness multiplier
Output data
Length
Input data
Flow
Diameter
Head loss
Temperature
Roughness multiplier
Output data
Input data
Diameter
Head loss
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.