The Stability of Vertical Gas-Solid Downflow in Bottom-Restrained Standpipes

Jones, PJ; Teo, C.S.; Leung, L. S.

doi:10.1007/978-1-4684-1045-7_49

Cited by 7 publications

(2 citation statements)

References 5 publications

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“…These authors adapted an analytic structure developed by Jones et al (1980) and Jones and Leung (1985) to describe multi-phase flows in standpipes. The flow is assumed to be one-dimensional, and in any particular froth or liquid layer, the bubble size is assumed constant.…”

Section: Liquid Transport In a Coalescing Frothmentioning

confidence: 99%

Liquid Transport in a Coalescing Froth

Ireland

Jameson

2007

Can J Chem Eng

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A previous study (Ireland and Jameson, J. Colloid Interface Sci., 314, 207-213 (2007)) demonstrated that a "drift-flux" model could describe liquid transport in a stable rising froth with added "wash water." In the present study, a drift-flux model was used to describe a rising coalescing froth. This model incorporated the effect of liquid released into the froth by coalescence. Vertical profiles of liquid fraction and bubble size were obtained in a laboratory cell; a novel technique was used for measuring bubbles deep within the cell. These data were consistent with the predictions of the drift-flux model.Une étude antérieure (Ireland et Jameson, J. Colloid Interface Sci., 314, 207-213 (2007)) démontre qu'un modèle à dérive de flux pourrait décrire le transport liquide dans une mousse en ascension stable avec ajout d' «eau de lavage». Dans la présente étude, on utilise un modèle à dérive de flux pour décrire une mousse coalescente en ascension. Ce modèle incorpore l'effet du relâchement de liquide dans la mousse par coalescence. Les profils verticaux de fraction liquide et de taille de bulles ont été obtenus dans une cellule de laboratoire; une nouvelle technique a été utilisée pour mesurer les bulles en profondeur dans la cellule. Ces données sont consistantes avec les prédictions du modèle à dérive de flux.

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Section: Liquid Transport In a Coalescing Frothmentioning

confidence: 99%

Liquid Transport in a Coalescing Froth

Ireland

Jameson

2007

Can J Chem Eng

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“…• Pressure gradient in downcomers, at orifices, friction loss [10,11,15,[17][18][19]30] • Transition and coexistence of flow regimes [10,15,16,[19][20][21][22][23] • Slug formation and bridging [15][16][17]23] • Sealing of downcomers, stripping of adsorbed gases [24,25] • Unstable operations [6,[20][21][22][26][27][28][29] • Aeration of downcomers [12, 13, 15-17, 19, 27, 37] • Erosion of walls [25] • Inclined standpipes [23,25,[30][31][32] • Mass flux [15,17] • Comprehensive reviews [21,30,33] Low pressure High pressure Determine the diameter of downcomers needed in a circulation system similar to Fig. 3(a), if the required circulation rate of solid is to be 600 kg/s.…”

Section: If the Upper Restriction Inmentioning

confidence: 99%