The relation between the Taylor bubble motion and the velocity field ahead of it

Polonsky, S.; Shemer, Lev; Barnea, Dvora

doi:10.1016/s0301-9322(99)00037-3

Cited by 132 publications

(88 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…As suggested in Shemer and Barnea (1987) and Polonsky et al (1999), the trailing bubble tip follows the location of the maximum liquid velocity in the profile ahead of the bubble. In the near-wake, the strong velocity fluctuations characteristic for this region are randomly distributed in the whole pipe cross section.…”

Section: Movement Of a Single Taylor Bubblementioning

confidence: 53%

“…2b). The results of this figure demonstrate that following the initial increase in the near-wake region, the centerline velocity may fall below the maximum liquid velocity for a developed velocity profile CU mean (Polonsky et al 1999). The consequence of this is that the trailing bubble's velocity, which, according to Eq.…”

Section: Movement Of Two Consecutive Bubblesmentioning

confidence: 90%

“…Collins et al (1978) arrived at very close values. Polonsky et al (1999) carried out simultaneous measurements of the velocity profiles ahead of the Taylor bubble using particle image velocimetry (PIV) and of the bubble propagation velocity in undeveloped laminar and turbulent pipe flow. The measured values of the coefficient C vary from 1.1 to 2.0, in good agreement with the ratio of the maximum to the mean velocity in the profile ahead of the Taylor bubble.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Movement of Two Consecutive Taylor Bubbles in Vertical Pipes

2007

View full text Add to dashboard Cite

Abstract. The development of slug flow along vertical pipes is governed by the interaction between consecutive elongated bubbles. It is generally assumed that the trailing bubble's shape and velocity are affected by the flow field in the liquid phase ahead of it. To examine this assumption, a facility is used that allows controlled injection of pairs of Taylor bubbles into vertical pipes filled with stagnant or flowing liquid. An experimental approach is developed to perform particle image velocimetry measurements of the velocity field in front of the trailing Taylor bubble, simultaneously with video imaging of Taylor bubble pairs, to be able to relate the instantaneous parameters (shape and velocity) of the trailing bubble to the instantaneous velocity distribution in liquid ahead of it. Experiments are performed in pipes of two diameters and for a number of Reynolds numbers based on mean water velocity, corresponding to both laminar and turbulent background flows. A model relating the propagation velocity of the trailing Taylor bubble to the local mean centerline velocity of the leading bubble is suggested and verified experimentally. The effect of the velocity fluctuations in the leading Taylor bubble's wake on the instantaneous propagation velocity of the trailing bubble is studied. 2 SHEMER, GULITSKI and BARNEA

show abstract

Section: Movement Of a Single Taylor Bubblementioning

confidence: 53%

Section: Movement Of Two Consecutive Bubblesmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Movement of Two Consecutive Taylor Bubbles in Vertical Pipes

2007

View full text Add to dashboard Cite

show abstract

“…on L/D ratio of 166.7 15,29,30 where they found that the velocity profile is well fitted with one-seventh powerlaw, despite the fact that they have used fixed pipe length in their investigation. From this result, it can be deduced that the L/D ratio of 1666.7 is not sufficient to achieve the fully-developed flow of the liquid ahead of the leading Taylor bubble.…”

mentioning

confidence: 98%

“…To test the code, a study on transient air-water flow in vertical upward was conducted and compared with the experimental measurements by Polonsky et al 29 The experimental test section facility consisting of 0.025m diameter and 4.0m length, was replicated by use of CAD tool and meshed in ICEM CFD. The numerical tests were carried out at axial distance of the test sections of 13.08, 13.12, 13.16, and 13.2 respectively.…”

mentioning

confidence: 99%

Effect of length-to-diameter ratio on axial velocity and hydrodynamic entrance length in air-water twophase flow in vertical pipes

Chidamoio¹,

Akanji²,

Rafati

2018

jogps

View full text Add to dashboard Cite

show abstract

Study on the flow structure and its effects on the interaction and formation of cryogenic taylor bubbles by PIV technique and POD analysis

et al. 2013

View full text Add to dashboard Cite

The flow structures around continuous cryogenic Taylor bubbles in the concentric glass tube with different diameters were investigated using particle image velocimetry (PIV) technique under various inclination angles. Optical distortions produced by tube curvature and the refractive index differences between tube and fluid were corrected using ray tracing method. Based on the PIV results, the proper orthogonal decomposition (POD) method was used to investigate the effect of flow structure on the interaction of Taylor bubbles through the large‐scale turbulent structures of POD modes. Four best‐fitted curves for Taylor bubble interaction for different inclination angles were represented. A correlation for Taylor bubble formation was developed with the consideration of turbulence suppression, tube inner diameter, fluid properties, inclination angle, etc. The results demonstrate that the minimum stable distance attains the smallest value at θ=60∘. The correlation for Taylor bubble formation shows good agreement with the experimental data both in the present study and from its references.

show abstract

The relation between the Taylor bubble motion and the velocity field ahead of it

Cited by 132 publications

References 34 publications

Movement of Two Consecutive Taylor Bubbles in Vertical Pipes

Movement of Two Consecutive Taylor Bubbles in Vertical Pipes

Effect of length-to-diameter ratio on axial velocity and hydrodynamic entrance length in air-water twophase flow in vertical pipes

Study on the flow structure and its effects on the interaction and formation of cryogenic taylor bubbles by PIV technique and POD analysis

Contact Info

Product

Resources

About