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ISSN Online: 2377-424X

ISBN Print: 0-89116-909-1

International Heat Transfer Conference 9
August, 19-24, 1990 , Jerusalem, Israel

INCREASE OF HEAT TRANSFER AND NEGATIVE EDDY VISCOSITY IN TURBULENT FLOWS INFLUENCED BY A MAGNETIC FIELD

Get access (open in a dialog) DOI: 10.1615/IHTC9.1220
pages 9-13

要約

Flows with virtually two-dimensional anisotropic turbulence have been studied experimentally. The onset of such modified turbulence has been achieved by influencing a mercury flow with special turbulizers and an external magnetic field. Mean velocities, turbulence intensities, energy spectra and heat transfer have been measured. The inversion of turbulent energy transfer leads to almost complete cessation of viscous dissipation of turbulence, to enhancement of large scale disturbances and heat transfer, and to the development of negative eddy viscosity. The results are of relevance to the investigation of flows in the ocean and atmosphere and to the design of thermonuclear reactors.