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DNS simulation of liquid metal flow in annuli under the effect of a magnetic field and volumetric heating

DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf.1000
13 pages

S. Kakarantzas
Department of Mechanical Engineering, University of Thessaly Athens Avenue, 38334 Volos, Greece

I. Sarris
Department of Mechanical Engineering, University of Thessaly Athens Avenue, 38334 Volos, Greece

A. Grecos
Department of Mechanical Engineering, University of Thessaly Athens Avenue, 38334 Volos, Greece

N. S. Vlachos
Department of Mechanical Engineering, University of Thessaly Athens Avenue, 38334 Volos, Greece

要約

MHD liquid metal natural convection flow is studied in closed annuli, the upper and bottom surfaces of which are considered adiabatic while the cylindrical walls are isothermal, with the temperature of the outer wall greater than that of the inner. Volumetric heating and an external transverse magnetic field are also applied. The dimensionless parameters characterizing the present flow are: the external Rayleigh number, Rae, corresponding to the magnitude of the temperature difference between the cylinders, the internal Rayleigh number, Rai, representing the intensity of heat generation, and the Hartmann number, Ha, expressing the amplitude of the magnetic field. Depending on the magnitude and interaction of these parameters, the flow may become laminar, transitional or turbulent. The effect of the magnetic field on the three-dimensional turbulent heat transfer is investigated using certain combinations of the above flow controlling parameters.

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