Worked example

Inputs

Density: 1000 kg/m³
Dynamic viscosity: 0.001 Pa·s
Pipe internal diameter: 0.01 m
Mean velocity: 0.1 m/s
Pipe length: 2 m

Expected results

Reynolds number: 1000
Pressure drop: 64 Pa
Wall shear stress: 0.08 Pa

Load the example in the workspace to reproduce these results. Display rounding does not change the underlying calculation.

How to use this tool

Enter every input in the labeled units; use measured or independently specified properties.
Check the stated model assumptions before calculating.
Interpret the output as a model estimate and verify it independently for the intended application.

Try this example

{
  "rho": 1000,
  "mu": 0.001,
  "diameter": 0.01,
  "velocity": 0.1,
  "length": 2
}

Accuracy and scope

Steady Newtonian fully developed laminar circular-pipe flow. Educational engineering estimate only; not structural or safety certification, equipment selection, or operating recommendations.

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Laminar Pipe Flow and Wall Shear