Two-phase magnetic fluid manipulation in microgravity environments

A new technique of measuring void fraction in magnetic fluid using electromagnetic induction was proposed. In order to establish the measuring method, a feasibility study was conducted experimentally with an aid of numerical analysis. From the results of static experiment and numerical analysis, it was obtained that there exists a linear relationship between the void fraction and the measured electromotive force, when induction coils were connected in series for Helmholtz excitation coils, regardless of distribution of air bubbles in magnetic fluid. By applying the calibrated linear relationship to actual two-phase situations, it was revealed that the proposed method yielded quite reasonable account for measuring the void fraction, showing excellent agreement with the mechanical measured data in the two-phase flow apparatus, and with the published correlation of the drift flux model. From the results of the present investigation, it was proved that the proposed technique is feasible for the actual measurement of void fraction in two-phase flow of magnetic fluid.

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Sound wave propagation in two-phase flow of a magnetic fluid

Journal of Magnetism and Magnetic Materials ◽

10.1016/0304-8853(90)90040-w ◽

1990 ◽

Vol 85 (1-3) ◽

pp. 147-150

Author(s):

T. Yamasaki ◽

M. Tsubota ◽

S. Kamiyama

Keyword(s):

Wave Propagation ◽

Magnetic Fluid ◽

Sound Wave ◽

Two Phase Flow ◽

Phase Flow ◽

Two Phase

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Boiling Two-Phase Flow Characteristics of a Magnetic Fluid in a Nonuniform Magnetic Field.

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B ◽

10.1299/kikaib.57.1617 ◽

1991 ◽

Vol 57 (537) ◽

pp. 1617-1622 ◽

Cited By ~ 4

Author(s):

Shinichi KAMIYAMA ◽

Takanobu KAMIYA ◽

Hiroki IZU

Keyword(s):

Magnetic Field ◽

Magnetic Fluid ◽

Two Phase Flow ◽

Flow Characteristics ◽

Nonuniform Magnetic Field ◽

Phase Flow ◽

Two Phase

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Numerical Prediction of Two-Phase MHD Power Generation System Using Cavitating Flow of Electrically Conducting Magnetic Fluid

Progress in Multiphase Flow Research ◽

10.3811/pmfr.1.249 ◽

2006 ◽

Vol 1 ◽

pp. 249-264

Author(s):

Jun ISHIMOTO

Keyword(s):

Power Generation ◽

Magnetic Fluid ◽

Cavitating Flow ◽

Numerical Prediction ◽

Generation System ◽

Two Phase ◽

Electrically Conducting ◽

Power Generation System

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Numerical Prediction of Cavitating MHD Flow of Electrically Conducting Magnetic Fluid in a Converging-Diverging Nozzle

Journal of Applied Mechanics ◽

10.1115/1.1794164 ◽

2004 ◽

Vol 71 (6) ◽

pp. 825-838 ◽

Cited By ~ 2

Author(s):

Jun Ishimoto

Keyword(s):

Magnetic Field ◽

Magnetic Fluid ◽

Mhd Flow ◽

Cavitating Flow ◽

Numerical Results ◽

Nonuniform Magnetic Field ◽

Working Fluid ◽

Two Dimensional ◽

Two Phase ◽

Electrically Conducting

The fundamental characteristics of the two-dimensional cavitating MHD flow of an electrically conducting magnetic fluid in a vertical converging-diverging nozzle under a strong nonuniform magnetic field are numerically predicted to realize the further development and high performance of a two-phase liquid-metal MHD power generation system using electrically conducting magnetic fluids. First, the governing equations of the cavitating flow of a mercury-based magnetic fluid based on the unsteady thermal nonequilibrium multifluid model are presented, and several flow characteristics are numerically calculated taking into account the effect of the strong nonuniform magnetic field. Based on the numerical results, the two-dimensional structure of the cavitating flow and cavitation inception phenomena of the mercury-based magnetic fluid through a converging-diverging nozzle are shown in detail. The numerical results demonstrate that effective two-phase magnetic driving force, fluid acceleration, and high power density are obtained by the practical use of the magnetization of the working fluid. Also clarified is the precise control of the cavitating flow of magnetic fluid that is possible by effective use of the magnetic body force that acts on cavitation bubbles.

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