Simultaneous measurement of velocity profile and liquid film thickness in horizontal gas–liquid slug flow by using ultrasonic Doppler method

Zhai, Lusheng; Xu, Bo; Xia, Haiyan; Jin, Ningde

doi:10.1016/j.cjche.2023.02.010

Cited by 13 publications

(14 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Finally, the observations reported in the present study, as well as those of previous works, notably Arabi et al (2021c) and Zhai et al (2023), showed clearly that the liquid lm zone in the case of plug ow has a shape close to that of the strati ed ow. The transition to the LAS ow resulted in the appearance of waves at this interface in the rst instance.…”

Section: Summary On Physical Phenomena Governing the Transition Betwe...supporting

confidence: 90%

Analysis of Horizontal Gas-liquid Intermittent Flow Sub-Regimes Transitions: Physical Mechanisms and Flow Maps

Arabi,

salhi,

Zenati

et al. 2023

Preprint

View full text Add to dashboard Cite

These recent years, several experimental investigations were carried out on horizontal gas-liquid two-phase sub-regimes including plug, Less Aerated Slug (LAS) and Highly Aerated Slug (HAS) flows. Such classification is based on the shape of the elongated bubble/liquid slug interface as well as the aeration in the liquid slugs. In this paper, an extensive experimental visualization was performed using air-water mixture in a 30 mm ID horizontal pipe covering a total of 189 operating conditions. It was reported, for the first time, that each sub-regime had a specific mechanism of aeration of the liquid slug flow. For instance, the presence of gas bubbles within liquid slugs, in case of plug flow, is due to the interfacial shear induced waves mechanism. The transitions to LAS and HAS flows are accompanied by the appearance of shearing-off and scooping mechanisms of bubbles, in the liquid film, into the liquid slug, respectively. In addition, the reported flow transition lines, as well as those existing in the literature, were analyzed using different existing coordinate systems. This analysis showed that the X-T system is the most suitable for predicting the three flow sub-regimes.

show abstract

Section: Summary On Physical Phenomena Governing the Transition Betwe...supporting

confidence: 90%

Analysis of Horizontal Gas-liquid Intermittent Flow Sub-Regimes Transitions: Physical Mechanisms and Flow Maps

Arabi,

salhi,

Zenati

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Finally, the observations reported in the present study, as well as those of previous works, notably Arabi et al (2021c) and Zhai et al (2023), show clearly that the liquid lm zone in the case of plug ow has a shape close to that of the strati ed ow. The transition to the LAS ow resulted in the appearance of waves at this interface in the rst place.…”

Section: Summary On Physical Phenomena Governing the Transition Betwe...supporting

confidence: 90%

“…Thus, the effect of the pipe diameter on the plug-to-LAS ows and LAS-to-HAS ows transitions were not analyzed. Additionally, few of these studies (Thaker and Banerjee, 2015, 2016a; Saini and Banerjee, 2021, 2023; Zhai et al, 2023) were interested in the comprehension of the mechanism governing each sub-regime. A qualitative analysis, based on some captured images of the ows, was carried out.…”

Section: (2022)mentioning

confidence: 99%

“…It was reported an increase of velocity, root mean square velocity and Reynolds stress of liquid lm with the plug-to-LAS and LAS-to-HAS ows transitions. Zhai et al (2023) developed eld-programmable gate array (FPGA) based ultrasonic Doppler system to measure simultaneously the velocity pro le and liquid lm thickness. The velocity pro les were used to detect the presence of gas bubbles.…”

Section: (2022)mentioning

confidence: 99%

“…In both ows, a great quantity of gas penetrates into liquid slugs. Meanwhile, as explained in detail by Zhai et al (2023), the gas penetrates through a gas core causing the destruction of the liquid slugs in pseudo slug ow which is not the case for HAS ows. The fact that the air bubbles are smaller in this sub-regime further complicates the distinction between them.…”

Section: Highly Aerated Slug Flowmentioning

confidence: 99%

See 2 more Smart Citations

Analysis of Horizontal Gas-liquid Intermittent Flow Sub-Regimes Transitions: Physical Mechanisms and Flow Maps

Arabi,

salhi,

Zenati

et al. 2023

Preprint

View full text Add to dashboard Cite

These recent years, several experimental investigations were carried out on horizontal gas-liquid two-phase flow by considering the sub-regimes which are plug, Less Aerated Slug (LAS) and Highly Aerated Slug (HAS) flows. These sub-regimes classification is based on the shape of the elongated bubble/liquid slug interface as well as the aeration within liquid slugs. In this work, an extensive experimental visualization was performed using air-water mixture in a 30 mm ID horizontal pipe. The study has covered a total of 189 operating conditions. It was reported, for the first time, that each sub-regime had a specific mechanism for aeration of the liquid slug flow. the presence of gas bubbles within liquid slugs, in the case of plug flow, is due to the interfacial shear induced waves mechanism. The transitions to LAS and HAS flows are accompanied by the appearance of the shearing-off and scooping of the bubbles present in the liquid film into liquid slug mechanisms, respectively. In addition, the reported flow transition lines, as well those existing in the literature, were analyzed using different existing coordinate systems. This analysis allowed finding that the X-T system is the most suitable one for predicting the three flow sub-regimes.

show abstract

Experimental and numerical study of wall phenomena of confined bubble flow in a square channel

Evdokimenko,

Blel,

Gentric

et al. 2025

Chemical Engineering Science

View full text Add to dashboard Cite

Simultaneous measurement of velocity profile and liquid film thickness in horizontal gas–liquid slug flow by using ultrasonic Doppler method

Cited by 13 publications

References 43 publications

Analysis of Horizontal Gas-liquid Intermittent Flow Sub-Regimes Transitions: Physical Mechanisms and Flow Maps

Analysis of Horizontal Gas-liquid Intermittent Flow Sub-Regimes Transitions: Physical Mechanisms and Flow Maps

Analysis of Horizontal Gas-liquid Intermittent Flow Sub-Regimes Transitions: Physical Mechanisms and Flow Maps

Experimental and numerical study of wall phenomena of confined bubble flow in a square channel

Contact Info

Product

Resources

About