Stokes Law Calculator app for iPhone and iPad

Stokes Law Calculator are physic/math calculator to find Acceleration of gravity, Medium viscosity, Medium density, Particle density, Particle diameter or Terminal velocity fast and easy.

Stokes Law describes the steady flow of a continuous stream of fluid which is in-compressible and has negligible viscosity. It is defined as the basis of the falling - sphere viscometer. In the viscometer the fluid is stationary in a vertical glass tube.

Features:
- Instant calculation
- Result are copy able to other app
- Formula are include as reference
- Support up to 16 decimal place
- Support various unit for each input

Stokes law states that at low velocities the frictional force on a spherical body moving through a fluid at constant velocity is equal to 6 π times the product of the velocity, the fluid viscosity, and the radius of the sphere. In short, a sphere moving through a viscous fluid is directly proportional to the velocity of the sphere as well as the radius of the sphere, and the viscosity of the fluid.

Formula
Fall or Settling Velocity :
Vt = gd2 (ρp - ρm)/18μ

Acceleration of Gravity :
g= 18 μ Vt /d2(ρp - ρm)

Particle Diameter :
d= √18 μ Vt /g (ρp - ρm)

Density of Medium :
ρm = ρp - 18 μ Vt/ d2

Particle Density :
ρp = 18 μ Vt /d2+ ρm

Viscosity of Medium :
μ = gd2( ρp - ρm)/18 Vt

Where,
Vt = Fall or Settling Velocity,
g = Acceleration of Gravity,
d = Particle Diameter,
ρm = Density of Medium,
ρp = Particle Density,
μ = Viscosity of Medium.

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