Experimental investigation of the velocity field induced by a Taylor bubble rising in stagnant water

Hout, R. van; Gulitski, A.; Barnea, Dvora; Shemer, Lev

doi:10.1016/s0301-9322(01)00082-9

Cited by 101 publications

(85 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This peak was previously detected in [5,6]. The similar structure was obtained in [7,8]. The third component is a positive pulsations behind the bubble.…”

Section: Resultssupporting

confidence: 83%

Wall shear stress from a single almost spherical and a Taylor bubbles in laminar upward tube flow

Timkin

Gorelik

2017

MATEC Web Conf.

View full text Add to dashboard Cite

Abstract. An experimental electrodiffusional technique with eight double probes is used to detect perturbation the wall shear stress caused by a single bubble in laminar upward tube flow. A small almost spherical and different length Taylor bubbles are considered. The shear stress perturbations by bubbles have a complex structure. It is possible to define three components of perturbation caused by a small bubble. The perturbation by Taylor bubble contains only two components due to the main flow symmetry around the bubble. An unexpectedly long shear stress pulsations zone is registered behind the bubbles.

show abstract

“…This peak was previously detected in [5,6]. The similar structure was obtained in [7,8]. The third component is a positive pulsations behind the bubble.…”

Section: Resultssupporting

confidence: 83%

Wall shear stress from a single almost spherical and a Taylor bubbles in laminar upward tube flow

Timkin

Gorelik

2017

MATEC Web Conf.

View full text Add to dashboard Cite

show abstract

“…The last term, which is absent in the original Moissis and Griffith correlation, is added to account for the slower decay in the translational velocity of elongated bubbles behind relatively long slugs. For additional extensive data on continuous slug flow evolution in vertical and inclined pipes see van Hout et al (2001van Hout et al ( , 2002avan Hout et al ( ,b, 2003.…”

Section: Experimental Results On the Evolution Of Slug Flow Along Incmentioning

confidence: 99%

Hydrodynamic and statistical parameters of slug flow

Shemer

2003

International Journal of Heat and Fluid Flow

View full text Add to dashboard Cite

In two-phase slug flow pattern, the bulk of the gas is trapped inside large bubbles that are separated by liquid slugs, which may contain small dispersed bubbles. The unsteady nature of slug flow makes the prediction of pressure drop and heat and mass transfer a difficult task. Earlier models that deal with steady slug flow assume constant lengths and shapes of liquid slugs and elongated bubbles, as well as a constant elongated bubble propagation velocity. However, due to the intrinsically irregular character of slug flow, statistical means are required for its proper description. Variation of the flow parameters along the pipes of various diameters and inclinations may strongly affect the resulting flow pattern and should thus be taken into account in modeling the flow. The development of slug flow along the pipe is mainly governed by the interaction between consecutive elongated bubbles. To gain a better insight into the mechanisms that govern slug flow evolution along pipes, experiments with controlled injection of consecutive elongated bubbles were performed in recent years. Due to the complexity of both the continuous slug flow and the liquid flow around injected bubbles, sophisticated experimental methods are required. The latest works regarding the hydrodynamic and statistics of naturally occurring continuous slug flow in pipes, as well as the results of experiments with controlled injection of elongated bubbles are reviewed. It is demonstrated how the information obtained in the controlled experiments can be applied to improve the performance of slug flow and slug tracking models.

show abstract

“…The accuracy of the local instantaneous PIV velocity measurements for the operational conditions of the present study was estimated to be better that 1 mm/s. For more details about the experimental facility and PIV measurements, see van Hout et al (2002) and Shemer et al (2007).…”

Section: Experimental Facilitymentioning

confidence: 99%

“…The liquid velocity in the film is usually several times larger than the mean velocity of the liquid in the slug, forming a circumferential wall jet. The velocity field in the wake of the Taylor bubble is complicated and has been subject to numerous investigations (van Hout et al 2002, Shemer et al 2005, 2007.…”

Section: Introductionmentioning

confidence: 99%

“…In the entrance region of the pipe, the distance between the bubbles is not sufficiently large, and thus bubbles move in the wake of their predecessors, resulting in merging of bubbles and variation of the flow structure along the pipe (Moissis andGriffith 1962, Taitel andBarnea 1990). The merging process results in decreasing the frequency of slugs along the pipe and in increasing the length of both elongated bubbles and liquid slugs (van Hout et al 2002).…”

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

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

Experimental investigation of the velocity field induced by a Taylor bubble rising in stagnant water

Cited by 101 publications

References 16 publications

Wall shear stress from a single almost spherical and a Taylor bubbles in laminar upward tube flow

Wall shear stress from a single almost spherical and a Taylor bubbles in laminar upward tube flow

Hydrodynamic and statistical parameters of slug flow

Movement of Two Consecutive Taylor Bubbles in Vertical Pipes

Contact Info

Product

Resources

About