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Hartmann number

Last modified by
on
Sep 1, 2023, 2:20:06 PM
Created by
on
Aug 12, 2016, 3:51:23 PM
`Ha = "B" * "L" sqrt( sigma / mu )`
`(B)"Magnetic Field Intensity"`
`(L)"Characteristic Length Scale"`
`(sigma)"Electrical Conductivity in S/m"`
`(mu)"Dynamic Viscosity"`
Tags
Fluid Mechanics Electromagnetic Force
UUID
9e8821e2-60a4-11e6-9770-bc764e2038f2

The Hartmann number calculator computes the ratio of electromagnetic force to the viscous force.

INSTRUCTIONS: Choose units and enter the following:

  • (B) Magnetic Field Intensity
  • (L) Characteristic Length
  • (σ) Electrical Conductivity
  • (μ) Dynamic Viscosity

Hartmann number (Ha): The calculator returns the ratio as a real number.

The Math / Science

The Hartmann Number equation is used to computes the ratio of electromagnetic force to the viscous force. The Hartmann Number equation is as follows:

`Ha=B*Lsqrt(sigma/mu)`,

where:

  • Ha = Hartmann Number
  • B = magnetic field
  • L = characteristic length scale
  • σ = electrical conductivity
  • μ = dynamic viscosity

This ratio was developed by Julius Hartmann of Denmark.

References

Wikipedia(https://en.wikipedia.org/wiki/Hartmann_number)
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