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Proceedings of CONV-14: International Symposium on Convective Heat and Mass Transfer.
June, 8-13, 2014, Kusadasi, Turkey

DOI: 10.1615/ICHMT.2014.IntSympConvHeatMassTransf


ISBN Print: 978-1-56700-356-7

ISSN Online: 2642-3499

ISSN Flash Drive: 2642-3502

THREE-DIMENSIONAL SWIRLING FLOWS WITH HEAT TRANSFER IN A CYLINDRICAL ENCLOSURE UNDER AXIAL MAGNETIC FIELD

pages 1259-1274
DOI: 10.1615/ICHMT.2014.IntSympConvHeatMassTransf.940
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要約

The present work examine numerically the effect of axial magnetic field on mixed convection through a cylindrical cavity, filled with a liquid metal and having a rotating top and bottom disks. Effects of Richardson number (Ri = 0, 0.5,1 and 2) and Hartman number (Ha = 0, 5,10 and 20) on temperature and flow fields were analyzed. The basic state of this system is steady and axisymmetric, when the counter-rotation is sufficiently large, producing a free shear layer. This shear layer is unstable and different complex flows appear successively: steady states with an azimuthal wavenumber of 1; travelling waves and steady states with an azimuthal wavenumber of 2 . Mixed modes and azimuthal wavenumber of 3 are also found with increasing Hartmann number. The stability diagram (Recr-Ha) corresponding to the axisymmetric-three-dimensional transition for increasing values of the axial magnetic field is obtained.

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