Air flow in this pipe.
The actual inside diameter of the pipe.
Specifies how quickly a liquid spreads relative to its mass if it is poured out on a flat surface. In the original case, set to air at 20˚C.
Are proportionality factor for the force it takes to parallel displace a surface relative to another, if the gap between these surfaces is filled with a viscous liquid or gas.
Density or volume of the mass is an SI unit and is a measure of a specific substance density, ie mass per unit volume. A synonym for density that can sometimes occur is specific gravity.
Pipe pressure drop corresponds to the force required to move the medium in the relevant pipe of 1 meter.
The velocity of the air in the tube.
The length of the tube.
Extensions for bends, valves, etc. in the system converted to meters of pipe.
A material constant that indicates how smooth pipe material is.
| Hagen-Poiseuille: |  |
Pressure drop calculation for laminar flow. |
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| Darcy-Weisbach: |  |
Pressure drop calculation for turbulent flow. |
| Colebrook-White: |  |
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| Serghides: |  |
Approxomativ solution for Colebrook-White. |
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| Reynolds number: |  |
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| Dynamic viskosity: |  |