A numerical model of slug flow in vertical tubes

Clarke, Andrew; Issa, R. I.

doi:10.1016/s0045-7930(96)00016-3

Cited by 32 publications

(13 citation statements)

References 17 publications

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“…The important question of when and how these slugs are formed has received much attention from research workers: [1][2][3][4][5] among others. A critical review of this topic is given by Fabre and Line [6].…”

Section: Introductionmentioning

confidence: 99%

Comparison of experimental and Computational Fluid Dynamics (CFD) studies of slug flow in a vertical riser

Abdulkadir

Hernández-Pérez

et al. 2015

Experimental Thermal and Fluid Science

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Section: Introductionmentioning

confidence: 99%

Comparison of experimental and Computational Fluid Dynamics (CFD) studies of slug flow in a vertical riser

Abdulkadir

Hernández-Pérez

et al. 2015

Experimental Thermal and Fluid Science

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“…Several researchers studied the motion of individual bubbles in stagnant liquid [7][8][9][10], usually in its asymptotic regimes: inertial flow, viscous flow and capillary flow.…”

Section: Introductionmentioning

confidence: 99%

Flow around individual Taylor bubbles rising in stagnant CMC solutions: PIV measurements

Sousa

Riethmuller

Pinto

et al. 2005

Chemical Engineering Science

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A slug flow simulator was developed considering: (i) an overtaking mechanism based on air-water co-current continuous experimental data [1]; (ii) expansion of the gas phase and its consequences in bubble length and velocity and (iii) several types of slug length and gas flow rate distributions, at column inlet. The simulator allows the monitoring of various flow characteristics, namely (i) the evolution of the distributions of several variables along the column; (ii) the definition of column zones, with different coalescence and (iii) the evaluation of the flow stability height (flow developing length), for certain flow conditions.The simulator was used to study the influence of the inlet slug length distribution over the stabilized slug flow pattern. Four similar simulations were prepared with inlet slug lengths normally distributed around averages of 0.075, 0.1, 0.15 and 0.2 m, and equal initial number of bubbles, inlet gas flow rate, and liquid flow rate. The output results showed to be independent of the inlet distributions, indicating that the bubble overtaking mechanism has dominant influence over the overall slug flow pattern development.

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“…Bugg et al [20] extended the numerical model of Mao and Dukler [18,19] to simulate a single Taylor bubble rising in stagnant liquid over a large range of conditions. In the paper of Clarke and Issa [21], the proposed method was based on the ensemble averaged transport equations governing the flow of the liquid around the Taylor bubble and in the slug. The presence of dispersed gas in the liquid slug was taken into account approximately by assuming homogeneous flow within the liquid slug.…”

Section: Introductionmentioning

confidence: 99%

“…Thus it is expected that the consideration of the dispersed small bubbles can lead to more reasonable results. Up to now, in addition to the authors, only Clarke and Issa [21] have referred to the dispersed small bubble. Nevertheless, the assumption of homogeneous flow within the liquid slug determines that the effect of heterogeneity due to the presence of dispersed small bubbles can not be reflected.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on near wall transport characteristics of slug flow in a vertical pipe

2012

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In this work, the wall shear stress and the mass transfer coefficient of the gas-liquid two-phase upward slug flow in a vertical pipe are investigated experimentally, using limiting diffusion current probes and digital highspeed video system. In experiments, the instantaneous and averaged characteristics of wall shear stress and mass transfer coefficient are concerned. The experimental results are compared with the numerical results in previous paper of the authors. Both experiment and numerical simulation show that the superficial gas and liquid velocities have an obvious influence on the instantaneous characteristics of the two profiles. The mass transfer coefficient has characteristics similar to the wall shear stress. The instantaneous wall shear stress and mass transfer coefficient profiles have the periodicity of slug flow. The averaged wall shear stress and mass transfer coefficient increase with increased superficial gas velocity. However, there is inconsistency in the variation trends of the averaged wall shear stress and mass transfer coefficient with superficial liquid velocity between experimental result and numerical simulation result, which can be attributed to the difference in flow condition. Moreover, the Taylor bubble length is also another impacting factor. The experimental and numerical results all shows that the product scale can not be damaged directly by the flow movement of slug flow. In fact, the alternative forces and fluctuations with high frequency acting on the pipe wall due to slug flow is the main cause for the slug flow enhanced CO 2 corrosion process.

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A numerical model of slug flow in vertical tubes

Cited by 32 publications

References 17 publications

Comparison of experimental and Computational Fluid Dynamics (CFD) studies of slug flow in a vertical riser

Comparison of experimental and Computational Fluid Dynamics (CFD) studies of slug flow in a vertical riser

Flow around individual Taylor bubbles rising in stagnant CMC solutions: PIV measurements

Experimental study on near wall transport characteristics of slug flow in a vertical pipe

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