Corresponding Waveform of Induced Electromotive Force and Flow Regime of Air-Magnetic Fluid Two-Phase Flow in Electromagnetic Induction Measuring Method

This paper describes a new discrimination technique of flow regime (flow pattern) for gas—liquid two-phase flow in magnetic fluid. The proposed technique can identify the flow regime with simple devices by exploiting the wave patterns of signals obtained by electromagnetic induction. This utilization achieves a mechanically non-contact measuring method for objective fluids. In this study, verification experiments for practical measurement were conducted in upward gas—liquid two-phase flow. The results of the experiments have verified that the proposed measuring technique is useful as a method for flow regime discrimination.

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Measurement of Void Fraction in Magnetic Fluid Using Electromagnetic Induction

Journal of Fluids Engineering ◽

10.1115/1.1566049 ◽

2003 ◽

Vol 125 (3) ◽

pp. 479-485 ◽

Cited By ~ 1

Author(s):

S. Shuchi ◽

H. Yamaguchi ◽

M. Takemura

Keyword(s):

Numerical Analysis ◽

Linear Relationship ◽

Void Fraction ◽

Magnetic Fluid ◽

Electromagnetic Induction ◽

Two Phase Flow ◽

Phase Flow ◽

Two Phase ◽

Actual Measurement ◽

Drift Flux Model

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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Flow regime classification in air–magnetic fluid two-phase flow

Journal of Physics Condensed Matter ◽

10.1088/0953-8984/20/20/204141 ◽

2008 ◽

Vol 20 (20) ◽

pp. 204141 ◽

Cited By ~ 1

Author(s):

T Kuwahara ◽

F De Vuyst ◽

H Yamaguchi

Keyword(s):

Flow Regime ◽

Magnetic Fluid ◽

Two Phase Flow ◽

Phase Flow ◽

Two Phase

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ESTIMATION OF MAJOR CORRELATIONS FOR FRICTIONAL PRESSURE DROP IN GAS-LIQUID TWO-PHASE FLOW IN HORIZONTAL PIPES USING PREDICTED FLOW REGIME INFORMATION

Multiphase Science and Technology ◽

10.1615/multscientechn.v12.i3-4.100 ◽

2000 ◽

Vol 12 (3-4) ◽

pp. 16 ◽

Cited By ~ 1

Author(s):

S. Momoki ◽

Avram Bar-Cohen ◽

Arthur E. Bergles

Keyword(s):

Pressure Drop ◽

Flow Regime ◽

Two Phase Flow ◽

Phase Flow ◽

Two Phase ◽

Horizontal Pipes ◽

Frictional Pressure Drop

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On Instabilities in Horizontal Two-Phase Flow

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19942595 ◽

1994 ◽

Vol 59 (12) ◽

pp. 2595-2603

Author(s):

Lothar Ebner ◽

Marie Fialová

Keyword(s):

Differential Equation ◽

Flow Regime ◽

Slug Flow ◽

Annular Flow ◽

Two Phase Flow ◽

Phase Flow ◽

Two Phase ◽

Annular Flows ◽

Flow Regime Maps

Two regions of instabilities in horizontal two-phase flow were detected. The first was found in the transition from slug to annular flow, the second between stratified and slug flow. The existence of oscillations between the slug and annular flows can explain the differences in the limitation of the slug flow in flow regime maps proposed by different authors. Coexistence of these two regimes is similar to bistable behaviour of some differential equation solutions.

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