Experimental study on the characteristics of flow pattern transitions of air-water two-phase flow in a horizontal pipe

Humami, Faris; Dinaryanto, Okto; Hudaya, Akhmad Zidni; Widyatama, Arif; Indarto, Indarto; Deendarlianto,

doi:10.1063/1.5049977

Cited by 16 publications

(6 citation statements)

References 13 publications

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“…These ndings underline the importance of using this sub-regime classi cation for a better understanding of intermittent ow (Arabi et al, 2024b). This classi cation method has allowed a number of ow maps to be drawn up for pipes with internal diameters of 16 mm (Dinaryanto et al, 2018), 20 mm (Zhai et al, 2023), 25 mm (Thaker and Banerjee, 2016) and 26 mm (Humami et al, 2018). Meanwhile, an analysis of these works shows that each author restricted himself to representing the experimental observation obtained using one pipe diameter on a ow map.…”

Section: Introductionmentioning

confidence: 94%

“…This gives to the interface, between the elongated bubble tail and the liquid slug nose, a staircase structure. Several works (Ruder and Hanratty, 1990;Humami et al, 2018;Saini and Banerjee, 2023) used the presence of this long tail to discriminate between plug ow and slug ow. According to Thaker and Banerjee (2016a), this structure is due to the higher acceleration of liquid slug near the bubble tail which tries to overcome the surface tension between the elongated bubble and the pipe.…”

Section: Plug Flowmentioning

confidence: 99%

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

Arabi,

salhi,

Zenati

et al. 2023

Preprint

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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.

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Section: Introductionmentioning

confidence: 94%

Section: Plug Flowmentioning

confidence: 99%

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

“…Using this classi cation approach, several ow pattern maps were developed for 16 mm , 20 mm (Zhai et al, 2023), 25 mm (Thaker and Banerjee, 2016) and 26 mm (Humami et al, 2018) ID pipes. Meanwhile, an analysis of these works shows that each author restricted himself to represent the experimental observation obtained using one pipe diameter on a ow map.…”

Section: (2022)mentioning

confidence: 99%

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.

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“…Indeed, it was found that the slug frequency (Arabi et al, 2020), the pressure drop (Arabi et al, 2021c) and the behaviour of the ow structures crossing a sudden expansion (Arabi et al, 2021d), depend on the nature of the sub-regime. Despite these results, the investigations carried out using these sub-regimes classi cation are still scarce, as indicated by the limited number of existing ow pattern maps, showing the zones of the existence of these sub-regimes (Thaker and Banerjee, 2016;Dinaryanto et al, 2018;Humami et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Identifying the intermittent flow sub-regimes using pressure drop time series fluctuations

Arabi

Salhi

Zenati

et al. 2023

Preprint

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From a literature survey, it has been noticed a lack of objective methods to identify and distinct between the intermittent flow sub-regimes. Thus, the aim of this study is to analyze pressure drop fluctuations using statistical methods in order to propose simple tools to characterize the sub-regimes of the intermittent flow. The pressure drop time series were collected from experiments carried out using air-water mixture and 30 mm ID pipe. The utilization of transparent pipes allowed to identify three sub-regimes which are Plug flow, Less Aerated Slug flow (LAS flow), and Highly Aerated Slug flow (HAS flow). It was found that the PDF displayed a unimodal distribution in all cases studied. Meanwhile, the representation of the base width and maximum values of PDF as function of the gas-to-liquid superficial velocities ratio and the mixture Froude number, respectively, showed that the points for each sub-regime are clustered in the same zone. So, these two feature spaces can be used to identify the sub-regimes. A third feature space, based on the statistical parameters standard deviation and kurtosis, was also proposed as a tool to distinguish between the three sub-regimes.

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Experimental study on the characteristics of flow pattern transitions of air-water two-phase flow in a horizontal pipe

Cited by 16 publications

References 13 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

Identifying the intermittent flow sub-regimes using pressure drop time series fluctuations

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