Initiation of slugs in horizontal gas-liquid flows

Experiments were conducted with air‐water flow in a horizontal 0.095‐m pipeline at atmospheric pressure to examine the mechanism by which slugs form in a stratified flow. A specially designed entrance box was used to avoid disturbances. In these experiments, at superficial gas velocities less than 3...

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Veröffentlicht in:AIChE journal 1993-11, Vol.39 (11), p.1741-1753
Hauptverfasser: Fan, Z., Lusseyran, F., Hanratty, T. J.
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container_title AIChE journal
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creator Fan, Z.
Lusseyran, F.
Hanratty, T. J.
description Experiments were conducted with air‐water flow in a horizontal 0.095‐m pipeline at atmospheric pressure to examine the mechanism by which slugs form in a stratified flow. A specially designed entrance box was used to avoid disturbances. In these experiments, at superficial gas velocities less than 3 m/s, the slugs are found to evolve from waves, with a length of about 0.085 m, that are generated by a Jeffreys mechanism. These waves grow in height and eventually double in wavelength by a nonlinear resonance mechanism. Depending on the height of the liquid, the growth can lead to a breaking wave or to a wave that fills the whole pipe cross section. At superficial gas velocities equal to or greater than 4 m/s capillary‐gravity waves with a wide range of lengths are generated by a linear Kelvin‐Helmholtz mechanism. These rapidly evolve into long waves outside the range of linear instability. If the liquid height is large enough, these waves can form slugs through a nonlinear Kelvin‐Helmholtz instability that is aided by wave coalescence.
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J.</creatorcontrib><title>Initiation of slugs in horizontal gas-liquid flows</title><title>AIChE journal</title><addtitle>AIChE J</addtitle><description>Experiments were conducted with air‐water flow in a horizontal 0.095‐m pipeline at atmospheric pressure to examine the mechanism by which slugs form in a stratified flow. A specially designed entrance box was used to avoid disturbances. In these experiments, at superficial gas velocities less than 3 m/s, the slugs are found to evolve from waves, with a length of about 0.085 m, that are generated by a Jeffreys mechanism. These waves grow in height and eventually double in wavelength by a nonlinear resonance mechanism. Depending on the height of the liquid, the growth can lead to a breaking wave or to a wave that fills the whole pipe cross section. At superficial gas velocities equal to or greater than 4 m/s capillary‐gravity waves with a wide range of lengths are generated by a linear Kelvin‐Helmholtz mechanism. 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J.</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Hyper Article en Ligne (HAL)</collection><collection>OSTI.GOV</collection><jtitle>AIChE journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Fan, Z.</au><au>Lusseyran, F.</au><au>Hanratty, T. J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Initiation of slugs in horizontal gas-liquid flows</atitle><jtitle>AIChE journal</jtitle><addtitle>AIChE J</addtitle><date>1993-11</date><risdate>1993</risdate><volume>39</volume><issue>11</issue><spage>1741</spage><epage>1753</epage><pages>1741-1753</pages><issn>0001-1541</issn><eissn>1547-5905</eissn><coden>AICEAC</coden><abstract>Experiments were conducted with air‐water flow in a horizontal 0.095‐m pipeline at atmospheric pressure to examine the mechanism by which slugs form in a stratified flow. A specially designed entrance box was used to avoid disturbances. In these experiments, at superficial gas velocities less than 3 m/s, the slugs are found to evolve from waves, with a length of about 0.085 m, that are generated by a Jeffreys mechanism. These waves grow in height and eventually double in wavelength by a nonlinear resonance mechanism. Depending on the height of the liquid, the growth can lead to a breaking wave or to a wave that fills the whole pipe cross section. At superficial gas velocities equal to or greater than 4 m/s capillary‐gravity waves with a wide range of lengths are generated by a linear Kelvin‐Helmholtz mechanism. These rapidly evolve into long waves outside the range of linear instability. If the liquid height is large enough, these waves can form slugs through a nonlinear Kelvin‐Helmholtz instability that is aided by wave coalescence.</abstract><cop>New York</cop><pub>American Institute of Chemical Engineers</pub><doi>10.1002/aic.690391102</doi><tpages>13</tpages><orcidid>https://orcid.org/0000-0001-8606-9321</orcidid></addata></record>
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source Wiley Online Library Journals Frontfile Complete
subjects 02 PETROLEUM
022000 - Petroleum- Transport, Handling, & Storage
03 NATURAL GAS
032000 - Natural Gas- Transport, Handling, & Storage
Chemical engineering
Chemical Sciences
Exact sciences and technology
FLOW BLOCKAGE
Fluid dynamics
FLUID FLOW
FLUID MECHANICS
Fundamental areas of phenomenology (including applications)
GAS FLOW
GRAVITY WAVES
LIQUID FLOW
MECHANICS
Multiphase and particle-laden flows
Nonhomogeneous flows
Physics
PIPELINES
TWO-PHASE FLOW
WAVE PROPAGATION
title Initiation of slugs in horizontal gas-liquid flows
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