Local interfacial area measurement in bubbly flow

Revankar, Shripad T.; Ishii, Mamoru

doi:10.1016/0017-9310(92)90257-s

Cited by 148 publications

(52 citation statements)

References 23 publications

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“…Local flow parameters such as void fraction, interfacial area concentration, and interfacial velocity were measured by a double-sensor conductivity probe [15,16]. The double-sensor conductivity probe is used basically as a phase identifier of the two-phase mixture.…”

Section: Double Sensor Probe Methodologymentioning

confidence: 99%

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Local flow measurements of vertical upward bubbly flow in an annulus

Hibiki

Situ

et al. 2003

International Journal of Heat and Mass Transfer

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Section: Double Sensor Probe Methodologymentioning

confidence: 99%

“…Thus, even Sauter mean diameter might be able to be approximated by 6(α-α c )/(a i -a i,c ). The double-sensor conductivity probe methodology was detailed in the previous paper [10,11,16,19,20].…”

Section: Double Sensor Probe Methodologymentioning

confidence: 99%

Local flow measurements of vertical upward bubbly flow in an annulus

Hibiki

Situ

et al. 2003

International Journal of Heat and Mass Transfer

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“…In fact, as illustrated in figure 5, maximum mean bubble diameters resulting in a mean volumetric void fraction of circa 2E-3 were measured at the lowest bulk fluid Reynolds number of 9.5E+3. Revankar and Ishii [18] and Liu [19] reported that in vertical two-phase pipe bubbly flow characterized with small bubble diameters and void fractions, uniform distributions are more likely across the pipe section in vertical fluid flow.…”

Section: Resultsmentioning

confidence: 99%

“…Serizawa et al [21], Michiyoshi and Serizawa [22], Revankar and Ishii [18], Liu and Bankoff [23] and Hibiki et al [24] reported that in contrast to the downward flow void fraction distribution, two-phase upward flow is expected to result in a peak void fraction close to the wall. Kashinsky and Randin [5] attributed this to the transverse lift force, as originally defined by Žun [20], acting on the bubble in an 01030-p. 5 upward flow (with an opposite sign to that for a downward flow), thus leading to wall peaked void fraction distribution profiles across the pipe section.…”

Section: Resultsmentioning

confidence: 99%

Two-phase distribution in the vertical flow line of a domestic wet central heating system

Fsadni

2013

EPJ Web of Conferences

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Abstract. The theoretical and experimental aspects of bubble distribution in bubbly two-phase flow are reviewed in the context of the micro bubbles present in a domestic gas fired wet central heating system. The latter systems are mostly operated through the circulation of heated standard tap water through a closed loop circuit which often results in water supersaturated with dissolved air. This leads to micro bubble nucleation at the primary heat exchanger wall, followed by detachment along the flow. Consequently, a bubbly two-phase flow characterises the flow line of such systems. The two-phase distribution across the vertical and horizontal pipes was measured through a consideration of the volumetric void fraction, quantified through photographic techniques. The bubble distribution in the vertical pipe in down flow conditions was measured to be quasi homogenous across the pipe section with a negligible reduction in t he void fraction at close proximity to the pipe wall. Such a reduction was more evident at lower bulk fluid velocities.

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“…The existing literature for needle probe sensors (Kataoka et al, 1986;Kataoka and Serizawa, 1990;Revankar and Ishii, 1992;Kalkach-Navarro et al, 1993;Cartellier, 1999;Dias et al, 2000;Fu, 2001;Wu et al, 2001;Kim et al, 2001;Euh et al, 2001;Shen et al, 2005;Pradhan et al, 2013) is employed to measure the local two-phase flow parameters in the present work. The four-sensor conductivity probe design used in the present experiments is based in the previous work of (Kim et al, 2001) and consisted of 4 enamelled copper wires (0.2 mm outer diameter).…”

Section: Four-sensor Probe Methodologymentioning

confidence: 99%

Local parameters of air–water two-phase flow at a vertical T-junction

Monrós-Andreu

Martínez‐Cuenca

Torró

et al. 2017

Nuclear Engineering and Design

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Significant experimental work and modeling about vertical T-junction as a phase separator has been done for churn and annular flows, but a survey on the literature reveals a lack of experimental data regarding bubbly flow nor any phenomenological explanation to their behavior. The objective of this work is to extend the understanding of these junctions by obtaining complete datasets, i.e. of both gas and liquid, of the phase splitting process in bubbly flow conditions by means of conductivity needle probes, Laser Doppler anemometry and visual inspection. Measurements and observations of the phase split, as well as the vortex structure in a vertical T-junction with equal pipe diameters (52 mm inner diameter), are reported. Results suggest a relationship between the vortex structure and the efficiency of the junction as phase separator.

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Local interfacial area measurement in bubbly flow

Cited by 148 publications

References 23 publications

Local flow measurements of vertical upward bubbly flow in an annulus

Local flow measurements of vertical upward bubbly flow in an annulus

Two-phase distribution in the vertical flow line of a domestic wet central heating system

Local parameters of air–water two-phase flow at a vertical T-junction

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