Showing papers on "Hartmann number published in 1985"
TL;DR: In this paper, the authors considered the unsteady laminar flow of an electrically conducting viscous fluid between parallel insulating plates subject to a transverse magnetic field.
4 citations
TL;DR: In this paper, the Hartmann boundary layer is used to control viscous two-phase liquid-metal flow in an open-circuit MHD channel, and it is shown that the flow velocity in the core region is effectively controled by the boundary layer on the insulating walls.
Abstract: Viscous homogeneous two-phase liquid-metal flow in an open circuit MHD channel is solved by the method of matched asymptotic expansions with respect to the reciprocal of Hartmann number, in order to make clear the mechanism of the boundary-layer loss, to estimate its order, and to find some methods to reduce it. It is shown that the flow velocity in the core region is effectively controled by the Hartmann boundary-layer on the insulating walls. The solution of the Hartmann boundary-layer shows clearly how the distribution of the void fraction, the wetness of the liquid-metal against the wall and the aspect ratio of the channel cross-section influence the boundary-layer loss. The order of the boundary-layer loss is estimated by the equivalent external load resistance of the closed circuit MHD channel for invisid homogeneous two-phase liquid-metal flow.
1 citations
01 Apr 1985
TL;DR: In this article, the stability of the laminar flow of a liquid film in crossed fields is investigated in the nonionduction approximation in the AIP model, and the stability is shown to be robust to cross fields.
Abstract: The stability of the laminar flow of a liquid film in crossed fields is investigated in the nonionduction approximation. (AIP)
1 citations
TL;DR: In this paper, the authors considered a homogeneous electrically conducting incompressible medium with a current in a homogenous external magnetic field and bounded by parallel insulating planes normal to the induction vector.
Abstract: The subject considered is a homogeneous electrically conducting incompressible medium with a current in a homogeneous external magnetic field and bounded by parallel insulating planes normal to the induction vector. When the current is fed by means of a system of coaxial electrodes located on one or both of the insulating planes, regions arise in which the medium is in rotational motion. If the lateral wall is at a sufficient distance from the electrodes, the rotating layer which forms as a result of the interaction of the axial magnetic field and the radial component of the electric current has free lateral boundaries. A study is made of the way in which the Reynolds number for the loss of stability in such a layer depends on the Hartmann number and on the geometric parameter for high values of the Hartmann number and low values of the magnetic Reynolds number.
1 citations