Prediction of the initiation of slugs with linear stability theory

Lin, Peifeng; Hanratty, Thomas J.

doi:10.1016/0301-9322(86)90005-4

Cited by 234 publications

(73 citation statements)

References 11 publications

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“…This was confirmed by the new experiments of Andritsos et al (1989). Lin & Hanratty (1986) also remarked that the transition to slugs occur through the growth of long wavelength interfacial instabilities with the increase of gas superficial velocities. However, Andritsos et al (1989) confirmed this phenomenon only for low-viscosity liquids, while, for the high-viscosity liquids, small wavelength instabilities appear primarily.…”

Section: Influence Of the Liquid Viscosity On Gas-liquid Horizontal Fsupporting

confidence: 58%

“…They might grow and bridge the pipe section, forming slugs, or might coalesce and give birth to long wavelength waves, which might develop into slugs. For this reason, Andritsos et al (1989) confirmed that the inviscid stability analysis of Lin & Hanratty (1986) could only predict the transition from stratified to slug flow for airwater experiments, and it did not manage to capture the same phenomenon for liquids with higher viscosities.…”

Section: Influence Of the Liquid Viscosity On Gas-liquid Horizontal Fmentioning

confidence: 97%

“…The work of Andritsos et al (1989) used the same experimental setup and fluids of Andritsos & Hanratty (1987a) to analyze the transition between horizontal stratified and slug flows, by revisiting the findings of Lin & Hanratty (1986). The latter observed that an increase in the liquid viscosity stabilizes the flow and consequently diminishes the initiation of slugs.…”

Section: Influence Of the Liquid Viscosity On Gas-liquid Horizontal Fmentioning

confidence: 99%

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Optimization of the Interfacial Shear Stress and Assessment of Closure Relations for Horizontal Viscous Oil-Gas Flows in the Stratified and Slug Regimes

PASQUALETTE¹

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Marcelo de Alencastro PasqualetteThe author graduated in Mechanical Engineering from the Federal University of Rio de Janeiro in 2015 with the cum laude honor. In the former, the author received a PIBIC-CNPq scholarship for two years and an ANP PRH-37 scholarship for other two years. He has been working at the SINTEF Institute of Brazil for four years in the areas of multiphase flow, thermodynamics and flow assurance. He has eight complete papers published at conferences and two peer-reviewed articles published at journals.

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Section: Influence Of the Liquid Viscosity On Gas-liquid Horizontal Fsupporting

confidence: 58%

Section: Influence Of the Liquid Viscosity On Gas-liquid Horizontal Fmentioning

confidence: 97%

Section: Influence Of the Liquid Viscosity On Gas-liquid Horizontal Fmentioning

confidence: 99%

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Optimization of the Interfacial Shear Stress and Assessment of Closure Relations for Horizontal Viscous Oil-Gas Flows in the Stratified and Slug Regimes

PASQUALETTE¹

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“…en contraste, los tapones hidrodinámicos se originan a partir de un flujo estratificado debido a perturbaciones en la interfaz gaslíquido. una onda se propaga y eventualmente crece en la tubería para formar un tapón (Lin, 1986). Los tapones hidrodinámicos son usualmente caracterizados por sus altas frecuencias de irregularidad en comparación a los tapones topográficos (Omowunmi et al, 2013).…”

Section: Caracteristicas Del Flujo Intermitente En Lineas De Producciónunclassified

Caracterización Y Mitigación Del Flujo Intermitente en Sistemas De Recolección Multifásicos Bajo Condiciones Dinámicas

Simancas

Garcia

Tamayo

2015

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*A quien debe dirigirse la correspondencia RESUMENLos desafíos asociados al fl ujo multifásico son tan antiguos como la industria del petróleo. en muchos campos de crudo y gas con líneas de fl ujo multifásico, la inestabilidad de la producción debido a la presencia de fl ujo intermitente es el principal problema de aseguramiento de fl ujo. en Colombia, los antecedentes de investigaciones de este tipo son escasos, por consiguiente se plantea la necesidad de realizar estudios similares en nuestro territorio. existen razones para creer que diferentes campos nacionales presentan problemas de aseguramiento de fl ujo relacionados con el fl ujo intermitente. el objetivo de este artículo es realizar una recopilación teórica de los estudios principales relacionados con el fl ujo intermitente en operaciones de la industria de Petróleo y Gas, que permita sentar las bases para trabajos posteriores en el área, con respecto a esta temática en el ámbito nacional. este trabajo detalla un estado del arte sobre el fl ujo intermitente, sus características y una revisión exhaustiva de los métodos de simulación existentes en la literatura. adicionalmente, plantea una metodología para realizar estudios de este tipo de fl ujos, al igual que una discusión sobre posibles estrategias de mitigación y su aplicación en campo.Palabras clave: aseguramiento de flujo, flujo Multifásico, flujo tipo tapón, flujo transiente, fenómenos de transporte, facilidades de superfi cie. Characterization and mitigation of slugging flow in oil gathering networks under dynamic conditions ABSTRACTChallenges associated to multiphasic fl ow are as old as the petroleum industry itself. in many oil and gas fi elds with multiphasic fl ow lines, production instability due to severe slugging is their main fl ow assurance issue. in Colombia, the previous works on this matter are rather limited. there are strong reasons to presume the existence of fl ow assurance issues related to severe slugging in many national fi elds. the main purpose of this article is to perform a technical compliance of the most relevant studies related to severe slugging in the Oil and Gas industry operations, which allows to set basis for further works in this area, addressing the matter in the national context. this paper contains a state-of-the-art review on severe slugging, intermittent fl ow, their characteristics, and a thorough revision of the existing numerical simulation methods in literature. in addition, this document proposes a methodology for the realization of similar studies, and a discussion of mitigation strategies and their application on fi eld operations.

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“…This flow pattern may arise in horizontal and slightly inclined pipes from stratified flow because of the growth of instabilities: small perturbations appear on the liquid surface, and then, some may grow into larger waves to fill the pipe completely due to the well-known Kelvin-Helmholtz instability [4][5][6]. Slug flow can also be established due to pipe slope changes, i.e., when the pipe inclination, initially horizontal or downward, turns upward: in this case, the liquid accumulates because of gravity, and the liquid volume fraction increases until the stratified-slug flow transition occurs [7].…”

Section: Introductionmentioning

confidence: 99%

Simplified 1D Incompressible Two-Fluid Model with Artificial Diffusion for Slug Flow Capturing in Horizontal and Nearly Horizontal Pipes

2017

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This article proposes a numerical resolution of a one-dimensional (1D), transient, simplified two-fluid model regularized with an artificial diffusion term for modeling stratified, wavy and slug flow in horizontal and nearly horizontal pipes. Artificial diffusion is introduced to prevent the unbounded growth of instabilities where the 1D two-fluid model is ill-posed. We propose a method to set the artificial diffusion case by case to obtain the desired cut-off at short wavelengths by combining the choice of the spatial discretisation and the amplification factors obtained by the linear stability analysis of the model. A proper criterion to simulate two-phase to single-phase flow transition, which occurs during slug formation, is also developed. Flow pattern transitions have been numerically computed and compared against theoretical transition boundaries and experimental observations. Moreover, we showed that the developed code computes slug initiation and slug characteristics, in a reasonably accurate way considering the simplicity of the model, comparing numerical results with well-known empirical correlations and experimental data. Furthermore, the model simplicity leads to a computationally-inexpensive numerical resolution; this can be useful in engineering applications where obtaining fast numerical results is fundamental, such as applications involving automated control for two-phase flows.

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Prediction of the initiation of slugs with linear stability theory

Cited by 234 publications

References 11 publications

Optimization of the Interfacial Shear Stress and Assessment of Closure Relations for Horizontal Viscous Oil-Gas Flows in the Stratified and Slug Regimes

Optimization of the Interfacial Shear Stress and Assessment of Closure Relations for Horizontal Viscous Oil-Gas Flows in the Stratified and Slug Regimes

Caracterización Y Mitigación Del Flujo Intermitente en Sistemas De Recolección Multifásicos Bajo Condiciones Dinámicas

Simplified 1D Incompressible Two-Fluid Model with Artificial Diffusion for Slug Flow Capturing in Horizontal and Nearly Horizontal Pipes

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