Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989ap%26ss.161...17h&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 161, no. 1, Nov. 1989, p. 17-25.
Astronomy and Astrophysics
Astrophysics
Liquid Metals, Magnetic Effects, Rotating Disks, Unsteady Flow, Viscosity, Boundary Layer Equations, Heat Transfer, Magnetic Field Configurations, Prandtl Number, Reynolds Number, Temperature Dependence
Scientific paper
This paper presents the study of the flow and heat-transfer characteristics in the unsteady flow of liquid metals due to a rotating disk subjected to a transverse magnetic field. The effects of the magnetic field are studied for various Prandtl numbers when the surface of the disk is subjected to cooling or heating. Numerical calculations have been carried out applying a finite difference approximation. It is found that as the magnetic parameter increases the velocities decrease while the temperature increases. Imposing suction the velocities increase while the temperature decreases. As the Prandtl number increases the temperature decreases. The increase of the magnetic parameter to values larger than 7.5 does not cause any variation to the velocities and temperature. Results are also presented for the heat-transfer rate and the displacement and momentum thickness.
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