Heat transfer in liquid metals with electric currents and magnetic fields: The conduction case

Kalkan, A. Kaan; Talmage, Gita

doi:10.1016/0017-9310(94)90086-8

Cited by 7 publications

(4 citation statements)

References 7 publications

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“…Masao Furukawa et al [21] examined the feasibility of an electromagnetic driven dream pipe by the analyses from both thermal and electrical points of view and showed that this novel heat transfer device may possibly replace the existing mechanically-driven dream pipes. Heat transfer studies with magnetohydrodynamic liquid metal flows are of great interest in the conceptual design of fusion power reactor [22] as liquid metals have incomparable heat transfer characteristics such as high thermal conductivity, high melting point and boiling point which eliminates the probability of local boiling [23]. The mentioned properties of liquid metals make them a good choice for the vacuum environment of space.…”

Section: Introductionmentioning

confidence: 99%

Study of Conjugate Heat Transfer in Electromagnetic Liquid Metal Dream Pipe

Puvaneswari

Karthikeyan

2017

Archive of Mechanical Engineering

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The combined effect of conjugation, external magnetic field and oscillation on the enhancement of heat transfer in the laminar flow of liquid metals between parallel plate channels is analyzed. In order to make our results useful to the design engineers, we have considered here only the wall materials that are widely employed in liquid metal heat exchangers. Indeed, all the results obtained through this mathematical investigation are in excellent agreement with the available experimental results. The effective thermal diffusivity κ e is increased by 3 · 10 6 times due to oscillation and that the heat flux as high as 1.5 · 10 10 (W/m 2 ) can be achieved. Based on our investigation, we have recommended the best choice of liquid metal heat carrier, wall material and its optimum thickness along with the optimum value of the frequency to maximize the heat transfer rate. At the optimum frequency, by choosing a wall of high thermal conductivity and optimum thickness, an increase of 19.98% in κ e can be achieved. Our results are directly relevant to the design of a heat transfer device known as electromagnetic dream pipe which is a very recent development.

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Section: Introductionmentioning

confidence: 99%

Study of Conjugate Heat Transfer in Electromagnetic Liquid Metal Dream Pipe

Puvaneswari

Karthikeyan

2017

Archive of Mechanical Engineering

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“…In recent years, investigations on the study of heat transfer in hydromagnetic oscillatory flows of liquid metals have gained a great momentum as such studies are important in the design of liquid metal magnetohydrodynamics ( MHD ) heat exchangers. Studies on heat transfer enhancement with liquid metals such as lithium, sodium, potassium, mercury, or even the eutectic mixture of sodium and potassium, in the presence of magnetic field, are of great interest in the conceptual design of fusion power reactor because of the excellent heat transfer characteristics of liquid metals like their high thermal conductivity, high melting point, and boiling point (very low vapor pressure) that actually removes the chances of local boiling . Moreover, in the design of lithium blankets of thermonuclear reactors, the liquid metal has to be circulated in the presence of a strong magnetic field .…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Heat Transfer in a Laminar Hydromagnetic Flow of a Liquid Metal Past a Thermally Conducting and Oscillating Infinite Flat Plate

Puvaneswari

Karthikeyan

2016

Heat Trans. Asian Res.

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The combined effects of conjugation and magnetic field on the heat transfer enhancement in a laminar liquid metal flow past a thermally conducting and sinusoidally oscillating infinite flat plate are investigated. The wall materials used are compatible with the liquid metals and are assumed to be of finite thickness. Analytical solutions are obtained for the velocity and the temperature distributions. The combined effects of thermal conductivity, the thickness of the plate, and the transverse magnetic field on the net heat flux transported are analyzed in detail and it is found that such effects are same as those on the transverse temperature gradient at any frequency. Due to oscillation, the heat flux is enhanced by O(10 3 ). The optimum value of wall thickness and the corresponding boundary layer thickness for which the maximum heat flux is obtained are reported. The heat flux transported can be increased by choosing a wall of low thermal conductivity. A maximum increase of 52.03% in heat flux can be achieved by optimizing the wall thickness. These information may be useful while designing magnetohydrodynamic liquid metal heat transfer systems. All the results obtained are in good agreement with the results reported earlier. C⃝

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“…The effects of Joule heating and viscous dissipation in liquid-metal sliding contacts for high-current applications is discussed in ref. 13. Measurements of the increase in heat flux from a supersonic, high-temperature inert-gas flow to the electrodes of a disk MHD generator, with increasing magnetic fields, is described in ref.…”

Section: Introductionmentioning

confidence: 99%

Magnetohydrodynamic compressible laminar boundary-layer adiabatic flow with adverse pressure gradient and continuous or localized mass transfer

Xenos¹,

Kafoussias

Karahalios

2001

Can. J. Phys.

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The problem of magnetohydrodynamic compressible boundary-layer flow over a flat plate, in the presence of an adverse pressure gradient, is studied numerically. The fluid is assumed to be Newtonian, electrically conducting and the magnetic field is constant and applied transversely to the direction of the flow. The fluid flow is subjected to a constant velocity of suction and (or) injection, continuous or localized, and there is no heat transfer between the plate and the fluid (adiabatic flow). The system of partial differential equations, describing the problem under consideration, is solved numerically by applying a modification of the Keller box technique. Numerical calculations are carried out for different values of the free-stream Mach number and the magnetic parameter for continuous or localized suction and (or) injection imposed at the wall. The results obtained are shown in the figures and their analysis shows that the flow field can be controlled by the application of a magnetic field as well as by continuous or localized suction and (or) injection.Résumé : On étudie numériquement le problème de la couche limite compressible magnétohydrodynamique sur une plaque plane en présence d' un gradient de pression adverse. Le fluide est supposé être Newtonien, conducteur électrique et le champ magnétique est constant et appliqué perpendiculairement à la direction de l'écoulement. L'écoulement du fluide est sujet à une vitesse constante de succion/injection qui peut être continue ou localisée et il n'existe pas de transfert de chaleur entre la plaque et le fluide (écoulement adiabatique). Le système d'équations différentielles partielles qui décrit le problème est résolu numériquement en utilisant une modification de la méthode « box » de Keller. Des calculs numériques ont été effectués pour différentes valeurs du nombre de Mach d'écoulement libre et du paramètre magnétique pour des conditions de succion/injection continues ou localisées imposées à la surface de la plaque. Les résultats obtenus sont reportés sur des figures et leur analyse a montré que le champ d'écoulement pourrait être contrôlé par l'application du champ magnétique aussi bien que par une suction/injection de fluide continue ou localisée.

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Heat transfer in liquid metals with electric currents and magnetic fields: The conduction case

Cited by 7 publications

References 7 publications

Study of Conjugate Heat Transfer in Electromagnetic Liquid Metal Dream Pipe

Study of Conjugate Heat Transfer in Electromagnetic Liquid Metal Dream Pipe

Enhancement of Heat Transfer in a Laminar Hydromagnetic Flow of a Liquid Metal Past a Thermally Conducting and Oscillating Infinite Flat Plate

Magnetohydrodynamic compressible laminar boundary-layer adiabatic flow with adverse pressure gradient and continuous or localized mass transfer

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