Abstract:
Buoyancy-driven magneto hydrodynamic flow in a
liquid-metal filled cylindrical enclosure is investigated by
numerical simulations, the finite volume method was applied
to solve the mass, momentum and energy equations. The
numerical result obtained shows the disappearance of the
vortex break down under the effect of an axial temperature
gradient between the bottom heated and the top cooled of
cylinder. In the case of the natural convection with and
without magnetic field for fluid with low Prandtl number,
the instability appears in the form of regular oscillations for
high values of the critical Grashof number, corresponding to
the Hartmann numbers. These oscillations are produced by
the multicellular mode of the flow. Diagrams of stability
show the dependence of the critical Grashof number and
critical frequency with the increase of the Hartmann number.
we note that, the action of the magnetic field has a
stabilizing effect on the flow.
Description:
Papers presented at the 13th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Portoroz, Slovenia on 17-19 July 2017 .
