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

Arabi, Abderraouf; Salhi, Yacine; Zenati, Youcef; Si‐Ahmed, El‐Khider; Legrand, Jack

doi:10.1016/j.ces.2019.115251

Cited by 51 publications

(29 citation statements)

References 74 publications

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“…The experiments were carried out on the same experimental device described by our previous works [13,14]. Figure 1 shows the schematic of the device composed of a 30 mm ID and 13 m long pipe, made entirely of transparent acrylic resin to allow flow visualization.…”

Section: Methodsmentioning

confidence: 99%

“…The interface of liquid slugs and gas pockets can exhibit various shapes, and liquid slugs can display different levels of aerations, resulting in several types of intermittent flows, called sub-regimes. Intermittent flows have been classified in three sub-regimes: Plug flow, Less Aerated Slug flow (LAS flow) and Highly Aerated Slug flow (HAS flow) [10][11][12][13]. The hydrodynamic behavior of each sub-regime is different [11,13] and requires to be modeled separately.…”

Section: Introductionmentioning

confidence: 99%

“…Intermittent flows have been classified in three sub-regimes: Plug flow, Less Aerated Slug flow (LAS flow) and Highly Aerated Slug flow (HAS flow) [10][11][12][13]. The hydrodynamic behavior of each sub-regime is different [11,13] and requires to be modeled separately. The distinction between the different sub-regimes has been often ignored and was referred to, in some cases, as slug flow [13], leading then to a less rigorous approach of the phenomena.…”

Section: Introductionmentioning

confidence: 99%

“…The hydrodynamic behavior of each sub-regime is different [11,13] and requires to be modeled separately. The distinction between the different sub-regimes has been often ignored and was referred to, in some cases, as slug flow [13], leading then to a less rigorous approach of the phenomena.…”

Section: Introductionmentioning

confidence: 99%

“…The slug frequency (f s ), defined as the number of slugs passing over a period of time, is an important parameter for industrials. Various models have been developed for its estimation [13]. Taitel and Dukler [17] explained that slug frequency is the inverse of the time for a slug to form.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Onset of intermittent flow: Visualization of flow structures

Arabi

Salhi

Bouderbal

et al. 2021

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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The transition from stratified to intermittent air-water two-phase flow was investigated experimentally, by flow visualization and pressure drop signals analyses, in a 30 mm ID pipe. The intermittent flow’s onset was found to be mainly dependent on the liquid superficial velocity and the pipe diameter. Plug flow, Less Aerated Slug (LAS) or Highly Aerated Slug (HAS) flows could be obtained on the gas superficial velocity grounds. The available models, compared to experiments, could not predict adequately the intermittent flow onset. The appearance of liquid slugs was revealed by peaks in the pressure drop signal. Furthermore, it was shown that the available slug frequency correlations were not valid in the zone of the onset of intermittent flow.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Onset of intermittent flow: Visualization of flow structures

Arabi

Salhi

Bouderbal

et al. 2021

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Performance of a Degassing Cyclone with Main and Subsidiary Chambers

Wang

Yang

2021

Chem Eng & Technol

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Based on the premise that large bubbles are removed in larger cyclones and small bubbles in smaller cyclones, a combined degassing cyclone with main and subsidiary chambers was designed to enhance liquid degassing. The pressure loss, liquid flow rate at the gas outlet, split ratio, gas flow rate at the liquid outlet, and degassing efficiency of the degassing cyclone were measured and calculated. Pressure loss correlations were established which relates the Euler number to the gas and liquid Reynolds numbers in the main chamber. Most cases exhibit a degassing efficiency greater than 0.998 when the liquid flow rate is more than 0.7 m 3 h -1 . The contours of pressure loss, split ratio, and degassing efficiency provide an effective guidance for designing a degassing cyclone.

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Practical aspects of multiphase slug frequency: An overview

Arabi,

Höhn,

Pallares

et al. 2024

Can J Chem Eng

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Slug frequency, the number of liquid slugs passing through a point per unit of time, is an intrinsic parameter that is used to characterize multiphase slug flows in pipes. In this review we discuss practical aspects of slug frequency for industrial purposes from an examination of published literature and available experimental data. The review shows that slug frequency appears to play a key role in the modelling of intermittent flow using 1‐D mechanistic slug models and 3‐D computational fluid dynamics tools. In addition, various global parameters and phenomena used to design, optimize, and control industrial pipelines are directly impacted by slug frequency. This manuscript highlights the importance of slug frequency not only for petroleum engineering but also for chemical, nuclear, and mechanical engineering.

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

Cited by 51 publications

References 74 publications

Onset of intermittent flow: Visualization of flow structures

Onset of intermittent flow: Visualization of flow structures

Performance of a Degassing Cyclone with Main and Subsidiary Chambers

Practical aspects of multiphase slug frequency: An overview

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