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THE FEUTEX TOOLKIT

Rapid Closure Water Hammer

Estimate instantaneous pressure rise and wave travel time.

Hydraulics workspace● Runs in your browser
01 Your input
02 Your result
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FormulaΔp=ρaΔV; characteristic round trip=2L/a.
Sources and model references

Worked example

Inputs

Fluid density
1000 kg/m³
Pressure wave speed
1000 m/s
Velocity decrease
1 m/s
Pipe length to reflecting boundary
100 m

Expected results

Ideal surge pressure
1000000 Pa
Round-trip wave time
0.2 s
Equivalent surge head
101.9716213 m

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

How to use this tool

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

Try this example

{
  "rho": 1000,
  "wave": 1000,
  "velocity": 1,
  "length": 100
}

Accuracy and scope

Joukowsky rapid-change estimate with supplied wave speed; does not model transient networks, cavitation or protection devices. Educational engineering estimate only; not structural or safety certification, equipment selection, or operating recommendations.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.