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Lehnert, B.; Little, N. C. (2011)
Publisher: Co-Action Publishing
Journal: Tellus A
Languages: English
Types: Article
Subjects:
Two experiments are described on the inhibition of convection in a magnetic field. In the first experiment a layer of mercury is placed in an inhomogeneous magnetic field and heated from below. Photographs show convection where the field is weak, but indicate no motion where the field is strong. The boundary between these two regions corresponds to a critical magnetic field in agreement with current theory. The boundary is well defined showing that the onset of convection is sensitive to variations in the magnetic field. In the second experiment with a homogeneous field, varied in direction from vertical to horizontal, it is the vertical component which controls the onset of motion. A strong horizontal field does not inhibit convection but causes motion in narrow cells elongated in the direction of the field.DOI: 10.1111/j.2153-3490.1957.tb01856.x
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    • CHANDRASEKHSA.,R19,52: O n the inhibition of convection by a magnetic field. Phil. Mag. [7], 43. p. 501.
    • JIRLOW, K., 1956: Experimental investigation of the inhibition of convection by a magnetic field. Tellus, 8, p. 252.
    • LEHNERTB,., 1955: An instability of laminar flow of mercury caused by an external magnetic field. Proc. Roy. SOC.A, 233, p. 299.
    • LEVENGOOWD,. C., 1956: Influence of a magnetic field on thermal convection patterns. Nature, '77. p. 631.
    • NAKAGAWAY., and FRENZENP,., 1955: A theoretical and experimental study of cellular convection in rotating fluids, Tellus, 7, p. I.
    • NAKAGAWYA., 1955: An experiment on the inhibition of thermal convection by a magnetic field. Nuture, 175, P. 417.
    • RAYLEIGHL,ORD,1916: Convection currents in a horizontal layer of fluid, when the higher temperature is on the under side. Phil. Mag. [6], 32, p. 529.
    • THOMPSOWN,. B., 1951: Thermal convection in a magnetic field. Phil. Mag. 171, 42, p. 1417.
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