The characteristics of the sub regime of slug flow in 16 mm horizontal pipe

Dinaryanto, Okto; Widyatama, Arif; Prestinawati, Maya; Indarto, Indarto; Deendarlianto,

doi:10.1063/1.5049980

Cited by 10 publications

(9 citation statements)

References 16 publications

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“…This map uses the superficial velocities of both phases as coordinates. It can be seen that the Dinaryanto et al (2018) flow map predicts better the transition lines of the present study than the Thaker and Banerjee map. The results using the PSD and Wilkens &Thomas were found to be close, in some cases, to a plug flow and less aerated slug flow.…”

Section: Figurementioning

confidence: 41%

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On gas-liquid intermittent flow in a horizontal pipe: Influence of sub-regime on slug frequency

Arabi

Salhi

Zenati

et al. 2020

Chemical Engineering Science

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Section: Figurementioning

confidence: 41%

“…The sub-regimes observations obtained were also compared with the transition lines of Dinaryanto et al (2018) in figure 7. This map uses the superficial velocities of both phases as coordinates.…”

Section: Figurementioning

confidence: 99%

On gas-liquid intermittent flow in a horizontal pipe: Influence of sub-regime on slug frequency

Arabi

Salhi

Zenati

et al. 2020

Chemical Engineering Science

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“…It is important to distinguish the pseudo-slug ow from the "classical" or "conventional" intermittent ow. The pseudo-slug ow is characterized by "short, undeveloped, frothy chaotic slugs, with a structure velocity less than the mixture velocity" as summarized recently by Fan et al (2022). Figure 3 shows reconstructed pseudo slug and liquid slug structures.…”

Section: Introductionmentioning

confidence: 90%

“…Recent studies carried out on this type of ow have demonstrated its difference from "conventional" intermittent ow. A detailed review of this work can be found in the review article of Fan et al (2022).…”

Section: Introductionmentioning

confidence: 99%

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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“…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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The characteristics of the sub regime of slug flow in 16 mm horizontal pipe

Cited by 10 publications

References 16 publications

On gas-liquid intermittent flow in a horizontal pipe: Influence of sub-regime on slug frequency

On gas-liquid intermittent flow in a horizontal pipe: Influence of sub-regime on slug frequency

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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