Stokes Law Calculator

What is a Stokes' Law Calculator?

A Stokes' Law Calculator is a tool used to determine the drag force, velocity, or viscosity of a small spherical object moving through a fluid. It is based on Stokes' Law, which describes the motion of small particles in a viscous medium.

Stokes' Law is applicable to laminar (slow) motion in fluids where the Reynolds number is low (Re < 1), meaning the particle moves smoothly without turbulence.

Why Use a Stokes' Law Calculator?

1. Quick and Accurate Drag Calculations – Helps determine the resistance a particle faces in a fluid.
2. Useful in Fluid Dynamics – Helps model motion in water, oil, air, or other fluids.
3. Essential for Industrial Applications – Used in designing sedimentation tanks, filters, and coatings.
4. Applies to Science and Engineering – Used in meteorology (raindrop motion), biology (cell movement), and chemistry (particle suspension).

How to Use a Stokes' Law Calculator?

1. Enter the Values:

   • Input the viscosity (η), particle radius (r), and velocity (v).

2. Click ‘Calculate’

   • The tool computes drag force (F_d) or solves for other variables.

3. Interpret the Results:

   • Compare with expected drag values for different fluids and conditions.

When to Use a Stokes' Law Calculator?

• In Physics and Engineering – To analyze motion in fluids and design efficient systems.
• In Sedimentation and Filtration – To predict how particles settle in liquids.
• In Meteorology and Environmental Science – To study rain droplet formation and pollutant movement.
• In Biological and Chemical Studies – To analyze cell movement, diffusion, and particle suspensions.