Bubble flow mechanisms in trickle beds—an experimental study using image processing

Benkrid, K; Rode, Sabine; Pons, Michel; Pitiot, Pascal; Midoux, N.

doi:10.1016/s0009-2509(02)00204-x

Cited by 23 publications

(13 citation statements)

References 15 publications

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“…When the flow regime changed from bubbly to either trickling or pulsing, there was a significant difference on the shape of bubble size distribution. The bubble size distributions were compared with Benkrid et al (2002) and results were in general agreement. Also, dominant bubble mechanisms of breakup and coalescence were observed and identified as 1. compression and deceleration for coalescence, and 2. shear, acceleration, and impact for breakup.…”

Section: Article In Pressmentioning

confidence: 75%

“…Observations by Tsochatzidis and Karabelas (1994) confirmed that the local flow patterns identified by Melli et al (1990) were close to those found at the wall of the cylindrical packed bed with random packing of 6 mm diameter spheres. The statistical studies of bubble number density and average bubble size in a two-dimensional packed-bed were performed by Benkrid et al (2002). Rode et al (2003) compared bubble size distribution, acquired by using resistive sensor, with that found by Benkrid et al (2002).…”

Section: Article In Pressmentioning

confidence: 99%

“…The statistical studies of bubble number density and average bubble size in a two-dimensional packed-bed were performed by Benkrid et al (2002). Rode et al (2003) compared bubble size distribution, acquired by using resistive sensor, with that found by Benkrid et al (2002). The investigations by Benkrid et al (2002) and Rode et al (2003) were limited to low interaction flow regime of bubbly flow with only a few bubble interactions.…”

Section: Article In Pressmentioning

confidence: 99%

“…Rode et al (2003) compared bubble size distribution, acquired by using resistive sensor, with that found by Benkrid et al (2002). The investigations by Benkrid et al (2002) and Rode et al (2003) were limited to low interaction flow regime of bubbly flow with only a few bubble interactions. Recently, Jo and Revankar (2009) studied changes of bubble size distributions with gas and liquid superficial velocities under bubbly flow and transition regimes.…”

Section: Article In Pressmentioning

confidence: 99%

See 3 more Smart Citations

Effect of coalescence and breakup on bubble size distributions in a two-dimensional packed bed

Revankar

2010

Chemical Engineering Science

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Section: Article In Pressmentioning

confidence: 75%

Section: Article In Pressmentioning

confidence: 99%

Section: Article In Pressmentioning

confidence: 99%

Section: Article In Pressmentioning

confidence: 99%

See 2 more Smart Citations

Effect of coalescence and breakup on bubble size distributions in a two-dimensional packed bed

Revankar

2010

Chemical Engineering Science

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“…The results from such studies have shown that [6][7][8][9] because of an added capillary resistance, foam can reduce the gas mobility by trapping gas in porous media. Pore-level investigations [16][17][18][19][20][21][22][23] consistently have been carried out to explore the law of the local migration of foam in porous media, including the generation, coalescence, and rupture of foam. In recent years, CT (computed tomography) has been used to study the dynamic change mechanism of foam during core flooding.…”

mentioning

confidence: 99%

Dynamic simulation and experimental verification of foam transport in porous media based on level set method

Zhang

Wang

et al. 2019

Energy Science & Engineering

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The properties of the foam fluid in porous media depend on its dynamic structure. However, few studies have focused on the dynamic structural change in foam. In this research, a method based on the level set method is proposed for the simulation of aqueous foam transport in porous media. As a first step, we focus on the Jamin effect, and a concise relation is established which reveals that the resultant pressure is proportional to the capillary pressure. Second, the snap‐off process of foam in porous media is studied, and both the two stages, including partial disintegration, are revealed based on the results. Third, the conclusion that foam automatically selects a larger channel in which to continue flowing is obtained by studying the foam selectivity. Finally, experiments are carried out to verify the simulation results using different models. The simulation results are in good agreement with the experimental results. These results are expected to be helpful for further understanding the foam characteristics and their effective applications.

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Impact of gravity on the bubble‐to‐pulse transition in packed beds

Salgi

Balakotaiah

2013

AIChE Journal

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A model based on two-phase volume-averaged equations of motion is proposed to examine the gravity dependence of the bubble-to-pulse transition in gas-liquid cocurrent down-flow through packed beds. As input, the model uses experimental correlations for the frictional pressure drop under both normal gravity conditions and in the limit of vanishing gravity, as well as correlations for the liquid-gas interfacial area per unit volume of bed in normal gravity. In accordance with experimental observations, the model shows that, for a given liquid flow, the transition to the pulse regime occurs at lower gas-flow rates as the gravity level or the Bond number is decreased. Predicted transition boundaries agree reasonably well with observations under both reduced and normal gravity. The model also predicts a decrease in frictional pressure drop and an increase in total liquid holdup with decreasing gravity levels. V C 2013 American Institute of Chemical Engineers AIChE J, 60: [778][779][780][781][782][783][784][785][786][787][788][789][790][791][792][793] 2014

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Bubble flow mechanisms in trickle beds—an experimental study using image processing

Cited by 23 publications

References 15 publications

Effect of coalescence and breakup on bubble size distributions in a two-dimensional packed bed

Effect of coalescence and breakup on bubble size distributions in a two-dimensional packed bed

Dynamic simulation and experimental verification of foam transport in porous media based on level set method

Impact of gravity on the bubble‐to‐pulse transition in packed beds

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