Hartmann number

From Wikipedia, the free encyclopedia

Hartmann number (Ha) is the ratio of electromagnetic force to the viscous force first introduced by Hartmann.^[1] It is defined by:

${\mathrm {Ha}}=BL{\sqrt {{\frac {\sigma }{\mu }}}}$

where

B is the magnetic field
L is the characteristic length scale
σ is the electrical conductivity
μ is the dynamic viscosity

See also

Magnetohydrodynamics

References

↑ Kenneth R.Cramer, Shih-l Pai (1973). Magnetofluid Dynamics for Engineers and Applied Physicists. Scripta Publishing Company. ISBN 0-07-013425-1.

This article is issued from Wikipedia. The text is available under the Creative Commons Attribution/Share Alike; additional terms may apply for the media files.