An impedance method for the measurement of liquid hold-up in two-phase flow

Andreussi, Paolo; Donfrancesco, A. Di; Messia, M. G.

doi:10.1016/0301-9322(88)90074-2

Cited by 131 publications

(65 citation statements)

References 6 publications

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“…Electrical impedance-based void fraction measurements have been successfully performed in the past several decades in macroscale two-phase flows. For crosssectional area-averaged or volume-averaged measurements, impedance void meters with electrodes flush mounted to the channel walls were used by Asali et al (1985), Andreussi et al (1988), Tsochatzidis et al (1992), Fossa (1998) and Mi et al (1998). A theoretical basis for this design is given in Coney (1973).…”

Section: Introductionmentioning

confidence: 99%

Electrical impedance-based void fraction measurement and flow regime identification in microchannel flows under adiabatic conditions

Paranjape

Ritchey

Garimella

2012

International Journal of Multiphase Flow

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Electrical impedance of a two-phase mixture is a function of void fraction and phase distribution. The difference in the specific electrical conductance and permittivity of the two phases is exploited to measure electrical impedance for obtaining void fraction and flow regime characteristics. An electrical impedance meter is constructed for the measurement of void fraction in microchannel two-phase flow. The experiments are conducted in air-water two-phase flow under adiabatic conditions. A transparent acrylic test section of hydraulic diameter 780 µm is used in the experimental investigation. The impedance void meter is calibrated against the void fraction calculated using analysis of images obtained with a high-speed camera. Based on these measurements, a methodology utilizing the statistical characteristics of the void fraction signals is employed for identification of microchannel flow regimes. A self-organizing neural network is used for classification of the flow regimes.

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Section: Introductionmentioning

confidence: 99%

Electrical impedance-based void fraction measurement and flow regime identification in microchannel flows under adiabatic conditions

Paranjape

Ritchey

Garimella

2012

International Journal of Multiphase Flow

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“…The oil will flow on the top of the horizontal pipe when the flow rate is low. For the ST flow pattern, in order to eliminate the influence of water conductivity change and normalize the measurement results, a dimensionless voltage V describing the relative voltage difference is introduced based on the analytical results [33] …”

Section: Conductance Measurement Correlationmentioning

confidence: 99%

Design of a Conductance and Capacitance Combination Sensor for water holdup measurement in oil–water two-phase flow

Tan

Dong

2015

Flow Measurement and Instrumentation

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“…Ring electrodes (Andreussi et al 1988), for resistive measurement and to achieve a uniform electric field structure within the sensing volume, the ring electrodes trade-off a localised cross-section measurement. Figure 8 (b).…”

Section: Electrical Impedance Measurementsmentioning

confidence: 99%