Prediction of the transition from stratified to slug and plug flow for long pipes

Hurlburt, Evan T.; Hanratty, Thomas J.

doi:10.1016/s0301-9322(02)00009-5

Cited by 73 publications

(28 citation statements)

References 28 publications

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“…Extending the application of the correlations to high viscosity liquid seems to be unable to obtain desire results. Hurlburt and Hanratty (2002) suggested that the relation for a laminar bubble should be used to calculate the shedding rate in slug stability. For Newtonian fluids with viscosities close to that for water the flow in the slug is turbulent, and the slug transition is closely approximated by the slug stability theory with current correlations of f i / f BG .…”

Section: Results and Comparisonmentioning

confidence: 99%

“…Equation 16 indicates the critical relative velocity needed for a Kelvin-Helmholtz instability to occur (Hurlburt and Hanratty 2002).…”

Section: Model Of Stratified Gas-liquid Flowmentioning

confidence: 99%

“…Since slug flow is developed from interfacial waves, influence of the variation in gas-liquid interfacial friction factor on the prediction of flow regime transition is taken into account. In prior study (Hurlburt and Hanratty 2002), good agreement has been achieved between predicted and measured critical liquid level heights, but discrepancy still exists in the prediction of the critical superficial liquid velocities. By quantificational analysis, we think that theoretical calculation gives less interfacial friction factors than measured data, so a partial modification of previous correlations is presented and validated by the comparison with the experimental data available in prior reports.…”

mentioning

confidence: 91%

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Gas–Liquid Interfacial Friction Factor for the Transition from Stratified to Slug Flow

Liu

Zhang

Wang

et al. 2008

Microgravity Sci. Technol

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Calculations based on the slug stability model and simplified stratified flow model provide predictions of the critical liquid height and the critical superficial velocities of a stratified flow for the transition to a slug flow in a horizontal pipe. Since slug flow derives from different interfacial waves patterns, previous interfacial waves model in stratified gas-liquid flows brings about the discrepancy between theoretical prediction and experimental data. A partial analysis for this behavior is given, which recognizes that the values of gas-liquid interfacial friction factor at the onset of slug flow have been underestimated, especially at high gas flows, and they should be obtained indirectly from other measured variables. Modified correlations for the interfacial friction factor are presented and better agreement between predicted and measured critical superficial velocities has been obtained.

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Section: Results and Comparisonmentioning

confidence: 99%

“…Equation 16 indicates the critical relative velocity needed for a Kelvin-Helmholtz instability to occur (Hurlburt and Hanratty 2002).…”

Section: Model Of Stratified Gas-liquid Flowmentioning

confidence: 99%

mentioning

confidence: 91%

See 1 more Smart Citation

Gas–Liquid Interfacial Friction Factor for the Transition from Stratified to Slug Flow

Liu

Zhang

Wang

et al. 2008

Microgravity Sci. Technol

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“…A comprehensive theoretical approach for flow regime transitions has been presented. These point to the need to improve our modeling of stratified flows (167,221).…”

Section: Accomplishmentsmentioning

confidence: 99%

Gas-Liquid Flow in Pipelines

Hanratty¹

2005

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“…Also, intermittent flows can induce severe transient loads on the structures with potentially catastrophic consequences. Although the slug and the plug flow regimes are both considered intermittent, the typical loads, lengths of slugs and bubbles and frequencies associated with each regime can be remarkably different (see Nydal et al, 1992;Hurlburt and Hanratty, 2002;Kadri et al, 2009). Thus, it is very important to distinguish between these regimes for a proper design of pipelines and damping devices, such as the slug catchers.…”

Section: Introductionmentioning

confidence: 99%