Hartmann number

The Hartmann number (Ha) is the ratio of electromagnetic force to the viscous force first introduced by Julius Hartmann.[1][2] It is frequently encountered in fluid flows through magnetic fields.[3] It is defined by:

where

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

See also

References

  1. Moreau, René; Molokov, Sergei S. (2007). "Julius Hartmann and His Followers: A Review on the Properties of the Hartmann Layer". In Molokov, Sergei S.; Moreau, René; Moffatt, H. Keith (eds.). Magnetohydrodynamics: Historical Evolution and Trends. Fluid Mechanics and Its Applications. 80. Springer. pp. 155–156. doi:10.1007/978-1-4020-4833-3_9. ISBN 978-1-4020-4833-3.
  2. Hunt, J.C.R.; Shercliff, J.A. (January 1971). "Magnetohydrodynamics at High Hartmann Number". Annual Review of Fluid Mechanics. 3: 37–62. Bibcode:1971AnRFM...3...37H. doi:10.1146/annurev.fl.03.010171.000345. Retrieved 2020-05-16.
  3. Cramer, Kenneth R.; Pai, Shih-i (1973). Magnetofluid Dynamics for Engineers and Applied Physicists. Scripta Publishing Company. ISBN 0-07-013425-1. LCCN 73009936.

Further reading

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.