Magnetohydrodynamic pressure drop in ducted two-phase flows

Owen, Robert; Hunt, J. C. R.; Collier, J. G.

doi:10.1016/0301-9322(76)90031-8

Cited by 18 publications

(3 citation statements)

References 2 publications

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“…Owen, Hunt & Collier (Culham Laboratory) presented two models for predicting the pressure drop in two-phase gas-liquid flows of conducting fluids for large values of the Hartmann number (see Owen, Hunt & Collier 1976). In the first of these models the gas-liquid mixture is treated as a single homogeneous pseudofluid with averaged mixture properties; such a 'bubbly' flow is well known in the absence of magnetic fields.…”

Section: Heat Transfer and Two-phase Flowmentioning

confidence: 99%

Liquid-metal magnetohydrodynamics with strong magnetic fields: a report on Euromech 70

Hunt

Moreau

1976

J. Fluid Mech.

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This paper is a summary of the first Euromech Colloquium to be held on Magnetohydrodynamics (MHD). It was organized in conjunction with the Centre National de la Recherche Scientifique and held at Grenoble from 16–19 March 1976 with 60 participants from 10 countries present. Papers were presented on laminar and turbulent MHD duct flows; heat transfer and two-phase flows in MHD; the effects of magnetic fields on instabilities and turbulence; the motion of and forces on solid objects in MHD flows; flow-measurement methods, and applications of MHD in the metallurgical industries, in sodium technology and in liquid-metal power generation. Our main conclusion is that there are many industrial applications of the existing body of research findings in MHD, but that quite new research problems have arisen as a result of the new applications, and that these need investigation. MHD lives!

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Section: Heat Transfer and Two-phase Flowmentioning

confidence: 99%

Liquid-metal magnetohydrodynamics with strong magnetic fields: a report on Euromech 70

Hunt

Moreau

1976

J. Fluid Mech.

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“…It was discovered that the flow rate of the conducting fluid can be increased by approximately 30 percent for suitable ratios of the depths and viscosities of the two fluids used in an electromagnetic pump. Owen et al [22] introduced two mechanistic models: a simple homogeneous model and a more sophisticated film flow model for computing the pressure drop in an MHD two-phase flow at high Hartmann numbers. Lohrasbi and Sahai [23] derived analytical solutions for the velocity and temperature profiles in a two-phase laminar steady MHD flow between two horizontal plates with one conducting phase.…”

Section: Introductionmentioning

confidence: 99%

Hartmann Flow of Two-Layered Fluids in Horizontal and Inclined Channels

Parfenov,

Gelfgat,

Ullmann

et al. 2024

Fluids

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The effect of a transverse magnetic field on two-phase stratified flow in horizontal and inclined channels is studied. The lower heavier phase is assumed to be an electrical conductor (e.g., liquid metal), while the upper lighter phase is fully dielectric (e.g., gas). The flow is defined by prescribed flow rates in each phase, so the unknown frictional pressure gradient and location of the interface separating the phases (holdup) are found as part of the whole solution. It is shown that the solution of such a two-phase Hartmann flow is determined by four dimensionless parameters: the phases’ viscosity and flow-rate ratios, the inclination parameter, and the Hartmann number. The changes in velocity profiles, holdups, and pressure gradients with variations in the magnetic field and the phases’ flow-rate ratio are reported. The potential lubrication effect of the gas layer and pumping power reduction are found to be limited to low magnetic field strength. The effect of the magnetic field strength on the possibility of obtaining countercurrent flow and multiple flow states in concurrent upward and downward flows, and the associated flow characteristics, such as velocity profiles, back-flow phenomena, and pressure gradient, are explored. It is shown that increasing the magnetic field strength reduces the flow-rate range for which multiple solutions are obtained in concurrent flows and the flow-rate range where countercurrent flow is feasible.

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“…Although pressure drops and void distributions in two-phase MHO flows with high quality have been studied by Thome (1964), Petrick (1975), Owen, et al (1976), Michiyoshi, et al (1977, and Dunn (1980), it seems necessary to obtain a deeper insight into the effects of a magnetic field on two-phase flow characteristics for the development of the above-mentioned MHO devices.…”

Section: Introductionmentioning

confidence: 99%

Effect of a Magnetic Field on Two-Phase Liquid Metal Flow and Cavitation Occurrence

Kamiyama

Yamasaki

Watai

1984

Chemical Engineering Communications

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To clarify the effect of a magetic field on two-phase bubble now characteristics and cavitation occurrence, an analytical study of two-phase MHD now with low quality is developed. laking into account slip and bubble expansion. Numerical calculation shows that the application of a magnetic field causes a decrease in pressure in the diverging passage and an increase in the incipient cavitation number KEYWORDS Liquid metal Two-phase flow Magnetic field Cavitation

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Magnetohydrodynamic pressure drop in ducted two-phase flows

Cited by 18 publications

References 2 publications

Liquid-metal magnetohydrodynamics with strong magnetic fields: a report on Euromech 70

Liquid-metal magnetohydrodynamics with strong magnetic fields: a report on Euromech 70

Hartmann Flow of Two-Layered Fluids in Horizontal and Inclined Channels

Effect of a Magnetic Field on Two-Phase Liquid Metal Flow and Cavitation Occurrence

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