Prediction of pressure drop in a modified gas–liquid downflow bubble column

Majumder, Subrata Kumar; Kundu, Gautam; Mukherjee, Dibyendu

doi:10.1016/j.ces.2006.01.049

Cited by 12 publications

(8 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As can be seen, the gas phase holdup was proportional to the gas suction rate. These are similar to the results related to gas phase holdup and suction rate in previous studies on vertical flow ejectors [2,5,6,[8][9][10][11][12][13][14][15].…”

Section: Gas Phase Holdupsupporting

confidence: 92%

“…The gas phase holdup increased with increasing viscosity and surface tension of the liquid, whereas the mass-transfer coefficient in the ejector decreased with increasing viscosity by 60%, maximally [7]. In the vertical flow ejectors of the liquid-gas system, the correlation equations of the gas phase holdup with gas suction rate were found in previous studies [2,5,6,[8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 59%

“…3, the gas suction rate increased with increasing liquid volumetric flow rate and decreased with increasing water height. The difference in the pressure dropbetween suction entrance and throat exit in the ejector affected the gas suction rate [19], causing the pressure to drop and increasing the formation of bubbles in the ejector and increasing the liquid volumetric flow rate [15]. Hence, more momentum was transferred from the motive water to air thus the gas suction and density of bubbles increased with increasing the liquid volumetric flow rate.…”

Section: Methodsmentioning

confidence: 97%

“…The performance of the ejector generally depends on the velocity of the motive fluid, the pressure drop through each part, and its geometric parameters, including nozzle diameter, mixing tube length, and diffuser length [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. In designing an ejector, the factors of suction rate (entrainment and aspiration); pressure drop across the entire length; phase holdup; and mass transfer characteristics are important parameters to determine quantitative relationships among its geometry, operating conditions, and performance [3] and as such have become the focus of much research.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Hydrodynamic characteristics of a horizontal flow ejector in a rectangular chamber

Kim

Lee

2009

Korean J. Chem. Eng.

View full text Add to dashboard Cite

The effects of the volumetric flow rate of primary motive water, water height, and the geometric parameters of the hydrodynamiccharacteristics of the gas suction rate and gas phase holdup were investigated in a rectangular chamber (0.22×0.26×1.2 m-high) with a horizontal flow ejector. Gas suction rate increased with increasing volumetric flow rate of the primary motive water, mixing tube length and diffuser length, but it decreased with increasing water height and nozzle diameter. The gas phase holdup was directly proportional to gas suction rate, indicating its corresponding increase with the volumetric flow rate of the primary motive water. Conversely, it decreased with increasing water height and nozzle diameter. However, the mixing tube length affected the gas phase holdup minimally compared to other operating parameters. Both the gas suction rate and gas phase holdup correlated with the dimensionless equations of operating parameters.

show abstract

Section: Gas Phase Holdupsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 59%

Section: Methodsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Hydrodynamic characteristics of a horizontal flow ejector in a rectangular chamber

Kim

Lee

2009

Korean J. Chem. Eng.

View full text Add to dashboard Cite

show abstract

“…To design and control such equipment efficiently, the values of pressure drops and volumetric fractions of phases must be determined (Begovich and Watson, 1978;Kato et al, 1981;Muroyama and Fan, 1985;Fan, 1989;Shah et al, 1982). Few experimental data on two-phase flow have been available in the downflow column (Marchese et al, 1992;Mandal et al, 2004;Majumder et al, 2006Majumder et al, , 2007Majumder et al, , 2010Sivaiah et al, 2010). There is a lack of studies on the phase fraction and pressure drops in this downflow system with gas-liquid-solid system.…”

Section: Introductionmentioning

confidence: 98%

Gas Holdup and Frictional Pressure Drop In a Modified Slurry Bubble Column

Sivaiah¹,

Majumder²

2012

International Journal of Chemical Reactor Engineering

Self Cite

View full text Add to dashboard Cite

This article presents the analysis of gas holdup, pressure drop and bubble size of gas-liquid-solid flow in a modified downflow slurry bubble column. The analysis is done based on the Lockhart-Martinelli principle. The Lockhart-Martinelli model is modified and incorporate to predict the frictional pressure drop and gas holdup of three-phase flow in the modified bubble column. The effects of operating variables such as slurry flow rate, gas flow rate, slurry concentration and particle diameter on frictional pressure drop and gas holdup are investigated. To predict the gas holdup, Sauter mean bubble diameter and pressure drop, correlations have also been developed as function of different dimensionless groups by introducing the operating variables and physical properties. The studies of the pressure drop in the downflow slurry bubble column may give insight into a further understanding and modeling of the three-phase flow characteristics in industrial applications.

show abstract

Energy Efficiency of Two‐Phase Mixing in a Modified Bubble Column

2007

Self Cite

View full text Add to dashboard Cite

Dans cet article on a analysé l'effi cacité énergétique pour le mélange gaz-liquide dans un réacteur à colonne à bulles à écoulement descendant modifi é. Les effi cacités des différentes régions de la colonne à bulles ont été évaluées sur la base de la dissipation d'énergie. On a utilisé une méthode de corrélation pour prédire le coeffi cient de dissipation d'énergie ainsi que l'effi cacité d'utilisation de l'énergie due au mélange gazliquide en fonction des différentes variables physiques, géométriques et dynamiques du système. La distribution de l'utilisation de l'énergie dans les différentes régions de la colonne a également été analysée. Des expériences ont été menées avec des solutions air-eau et air-solutions aqueuses de carboxyméthylcellulose à différentes concentrations.

show abstract

Prediction of pressure drop in a modified gas–liquid downflow bubble column

Cited by 12 publications

References 27 publications

Hydrodynamic characteristics of a horizontal flow ejector in a rectangular chamber

Hydrodynamic characteristics of a horizontal flow ejector in a rectangular chamber

Gas Holdup and Frictional Pressure Drop In a Modified Slurry Bubble Column

Energy Efficiency of Two‐Phase Mixing in a Modified Bubble Column

Contact Info

Product

Resources

About