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THE FEUTEX TOOLKIT

Stokes Particle Settling

Estimate spherical particle settling speed and check particle Reynolds number.

Hydraulics workspace● Runs in your browser
01 Your input
02 Your result
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FormulaVt=(ρp−ρf)gd²/(18µ).
Sources and model references

Worked example

Inputs

Particle diameter
1e-05 m
Particle density
2500 kg/m³
Fluid density
1000 kg/m³
Dynamic viscosity
0.001 Pa·s
Settling distance
0.1 m

Expected results

Terminal settling speed
8.172208333e-05 m/s
Particle Reynolds number
0.0008172208333
Terminal-speed travel time
1223.659456 s

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

{
  "diameter": 0.00001,
  "particle": 2500,
  "fluid": 1000,
  "mu": 0.001,
  "depth": 0.1
}

Accuracy and scope

Isolated sphere in creeping flow; excludes particle interactions, non-Newtonian fluids and wall effects. 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.