Suppression of turbulence in magnetically stabilized ferroliquids

Ronald Adrian, J. D. Buckmaster

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Under conditions of saturated magnetization ferroliquids obey Boussinesq equations in which the body force term is a combination of the ordinary gravitational force and a magnetic force that is proportional to the gradient of the magnetic field and the local temperature fluctuation. Hence non-isothermal flows of ferroliquids can be stabilized or destabilized by the application of a magnetic field. In this paper we examine the effects of magnetic stabilization which can be used to delay the transition from laminar to turbulent flow, or to suppress the level of turbulent transport in fully turbulent flows. The analogy between ferroliquid flows and stratified flows is developed to permit the application of results from studies of stratified flows. Using this analogy the magnitude of turbulence suppression is examined for a limiting case of fully developed turbulent channel flow with constant transverse heat flux. It is found that the channel friction factor can be reduced perceptably with attainable magnetic field strengths and moderate heat fluxes, and that reductions exceeding one order of magnitude can be achieved in extreme conditions. The friction factor reduction is largest for small Reynolds number and decreases with increasing flow rate when the heat flux is held constant.

Original languageEnglish (US)
Pages (from-to)303-312
Number of pages10
JournalInternational Journal of Engineering Science
Volume19
Issue number2
DOIs
StatePublished - 1981
Externally publishedYes

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Heat flux
Turbulence
Magnetic fields
Turbulent flow
Friction
Channel flow
Magnetization
Reynolds number
Stabilization
Flow rate
Temperature

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Suppression of turbulence in magnetically stabilized ferroliquids. / Adrian, Ronald; Buckmaster, J. D.

In: International Journal of Engineering Science, Vol. 19, No. 2, 1981, p. 303-312.

Research output: Contribution to journalArticle

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