Results 211 to 220 of about 10,361 (261)
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Statistical characterization of slug flow in horizontal pipes
International Journal of Multiphase Flow, 1992Abstract Air/water slug flow in 53 and 90 mm i.d. horizontal pipes has been investigated for a large range of gas and liquid velocities. For this purpose a special instrumentation with simultaneous data acquisition and analysis has been developed. This has been used to determine the mean slug characteristics (length, holdup and velocity) and their ...
NYDAL OJ +2 more
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Continuous Slug Flow in Vertical Tubes
Journal of Heat Transfer, 1974A method of simulating the behavior of continuously slugging vertical columns is presented. Slugs are introduced at regular time intervals at some reference level near the bottom of a column and their subsequent motion and coalescence is simulated numerically.
Clift, R, Grace, JR, Sollazzo, V
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Chemical Engineering Communications, 1996
Abstract A novel approach to modelling transient slug flow is presented. Aspects of current physical descriptions of slug flow, required as closure laws for the models are briefly reviewed. It is demonstrated how the dynamics of large scale changes in slug flow may be simulated, by incorporating a unit cell type of slug flow model into numerical ...
KJELL H. BENDIKSEN +2 more
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Abstract A novel approach to modelling transient slug flow is presented. Aspects of current physical descriptions of slug flow, required as closure laws for the models are briefly reviewed. It is demonstrated how the dynamics of large scale changes in slug flow may be simulated, by incorporating a unit cell type of slug flow model into numerical ...
KJELL H. BENDIKSEN +2 more
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Sensitivity of Slug Flow Mechanistic Models on Slug Length
Volume 7: Offshore Geotechnics; Petroleum Technology, 2009Slug flow is one of the common flow patterns in gas and oil production and transportation. One of the closure relationships required by the multiphase flow mechanistic models is slug length correlation. There are several closure relationships proposed in the literature as function of pipe geometry, pipe diameter and inclination angle, and to a lesser ...
Cem Sarica +2 more
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Critical liquid flows for the transition from the pseudo-slug and stratified patterns to slug flow
International Journal of Multiphase Flow, 2003Abstract It has recently been shown that a consideration of the stability of a stratified flow and of the stability of a slug has provided accurate predictions of the critical liquid height of a stratified flow for the transition to a slug or plug flow in horizontal and downwardly inclined pipes.
A. Soleimani, T.J. Hanratty
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Powder Technology, 1967
The paper begins by summarising theory and experimental data concerning the rate of rise of a large gas bubble or slug through an inviscid liquid in a vertical tube, or between two flat plates. Experimental data show that the theory can be used to predict the rise of slugs in fluidised beds.
P.S.B. Stewart, J.F. Davidson
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The paper begins by summarising theory and experimental data concerning the rate of rise of a large gas bubble or slug through an inviscid liquid in a vertical tube, or between two flat plates. Experimental data show that the theory can be used to predict the rise of slugs in fluidised beds.
P.S.B. Stewart, J.F. Davidson
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BUBBLY-TO-SLUG TRANSITION IN VERTICAL FLOWS
Multiphase Science and Technology, 2003Alternative mechanisms for the bubble-to-slug transition in vertical flows are discussed. Linking the transition to void wave formation has tended to replace earlier hypotheses of bubble coalescence but neither is consistent with all the observations. Thus, several fundamental questions remain.
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Journal of Heat Transfer, 1961
Entrance effects can persist for great lengths, L/D = 300, and long times, in developing two phase flows. Wall shear stresses at moderate and low velocities contribute only slightiy to the pressure drop in slug flows. Bubblerise velocities in slug flow are quite sensitive to the velocity profile in the water ahead of the bubbles.
Peter Griffith, Graham B. Wallis
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Entrance effects can persist for great lengths, L/D = 300, and long times, in developing two phase flows. Wall shear stresses at moderate and low velocities contribute only slightiy to the pressure drop in slug flows. Bubblerise velocities in slug flow are quite sensitive to the velocity profile in the water ahead of the bubbles.
Peter Griffith, Graham B. Wallis
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1959
Introduction: When two phases flow concurrently in a pipe, they can distribute themselves in a number of different configurations. The gas could be uniformly dispersed throughout the liquid in the form of small bubbles. There could be large gas bubbles almost filling the tube.
Griffith, P., Wallis, Graham B.
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Introduction: When two phases flow concurrently in a pipe, they can distribute themselves in a number of different configurations. The gas could be uniformly dispersed throughout the liquid in the form of small bubbles. There could be large gas bubbles almost filling the tube.
Griffith, P., Wallis, Graham B.
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Experimental Study of the Slug Flow
2011Slug flow is the flow pattern that more often is presented in two-phase flow. It has a complex physical configuration which has not been totally understood. For decades slug flow has been modeled by mechanistic approach with the use of the slug-unity concept. For this, slug length must be known.
O. C. Benítez-Centeno +2 more
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