Liquid Oxygenation Improvement by Interaction of Bubbles and Vibration Fields

Grinis, Leonid; Kholmer, Vladislav; Korin, Eli

doi:10.1002/ceat.200401960

Cited by 5 publications

(7 citation statements)

References 4 publications

(13 reference statements)

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“…where Re study [11] were used to obtain the values of this variable. The number of bubble up and down movements k were measured experimentally and varied from 2 to 30 for the applied range of vibration frequencies and amplitudes.…”

Section: Theoretical Approachmentioning

confidence: 99%

“…The number of bubble up and down movements k were measured experimentally and varied from 2 to 30 for the applied range of vibration frequencies and amplitudes. Bubble velocity was calculated by equations obtained in a previous study [11].…”

Section: Theoretical Approachmentioning

confidence: 99%

“…In the present research, a vibrating plate located above the air outlet orifice is used as suggested previously in [11]. The vibrations of the plate generate a downward stream in the liquid.…”

Section: Introductionmentioning

confidence: 98%

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Effect of Plate Oscillation on Bubble Residence Time in an Aerated Stagnant Liquid

Grinis¹,

Kholmer²,

Fominykh³

2005

Chem. Eng. Technol.

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Gas transfer efficiency during absorption is an important factor in various technological processes involving the interaction between liquid and gaseous systems. It is known that gas bubble motion characteristics strongly affect the efficiency of mass transfer during gas absorption. A device for mechanical vibration of an aerated liquid was designed, based on a cylindrical column filled up with tab water and a plate oscillating in the vertical direction. The goal of the present study is to investigate the effect of vibration parameters such as amplitude, frequency and form of the applied signal on the efficiency of the oxygenation process. Bubble residence time in the liquid and bubble depth of submergence related to the oscillating plate surface were chosen as main parameters for measurements. Furthermore, experiments were conducted to study the effect of the design parameters of the vibrating plate on bubble motion characteristics. The resultant data show that bubble residence time and depth of submergence can be controlled by changing the amplitude, the frequency and the form of the vibration field applied.

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Section: Theoretical Approachmentioning

confidence: 99%

Section: Theoretical Approachmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Plate Oscillation on Bubble Residence Time in an Aerated Stagnant Liquid

Grinis¹,

Kholmer²,

Fominykh³

2005

Chem. Eng. Technol.

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“…In the present research, a vibrating plate suggested in previous studies [6,7] is used, but here it is located sufficiently close to the liquid surface. Vibrations of the plate generate gas bubbles and entrain them into the liquid.…”

Section: Introductionmentioning

confidence: 99%

“…The influence of vibrations on gas bubble behavior in liquids was investigated theoretically and experimentally in various studies [5][6][7]. It was shown theoretically that when a small bubble is placed in a vertically vibrating liquid, it is subjected to a downward force which opposes the buoyancy force due to gravity.…”

Section: Introductionmentioning

confidence: 99%

Gas Holdup from the Free Surface of Liquids Subjected to a Vertically Vibrating Plate

Grinis

Kholmer

2007

Chem Eng & Technol

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Gas holdup is an important factor in the various technological processes involving the interaction between liquid and gaseous systems. The goal of the present research is to study the effect of vibration parameters and plate design on the gas holdup efficiency in a vibrating plate column. The gas bubbles were generated by the vibrating plate, which was sufficiently close to the liquid surface. An analytical model for the calculation of the gas holdup was developed. A device for the introduction of the gas and the vertical vibration of the liquid was designed and used in this research. The experimental data obtained are in good agreement with the theoretical calculations. The results show the possibility of enhancing the gas holdup by changing the vibration parameters and optimizing the vibrating plate unit design parameters.

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Optimization of semi‐pulsatile liquid‐liquid extraction operations in milli‐channels

2021

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The work in this manuscript presents liquid‐liquid extraction augmentation and optimization due to flow pulsations on a continuous flow. The mass transfer is achieved via a transfer species (acetic acid) that diffuses in the aqueous phase (water), which is in a continuous flow, from the organic phase (toluene), exhibiting pulsed flow pattern. It is observed through experiments that the incorporation of pulsation leads to enhanced extraction/mass transfer compared to continuous flows. Also, an increase of the pulsation parameters, such as amplitude and frequency, increases the mass transfer, but when the process is evaluated in terms of economy, it is found that the rate of extraction per unit power is maximum for moderate frequencies and amplitudes. Based on the experiments, a Linton and Sherwood‐like correlation for determining extracted concentration at the exit of the test section in semi‐pulsatile flow conditions is proposed. During the course of experiments, it is found that the flow pattern changes from dispersed‐type flow pattern of the organic phase to slug and then slug dispersed with an increase of superficial velocity of toluene, at a particular superficial velocity of the water. Also, the total power consumed during the extraction process increases with an increase in the product of amplitude and frequency. With the experimental approach presented in this paper, one will be able to optimize semi‐pulsatile liquid‐liquid mass transfer operations.

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Liquid Oxygenation Improvement by Interaction of Bubbles and Vibration Fields

Cited by 5 publications

References 4 publications

Effect of Plate Oscillation on Bubble Residence Time in an Aerated Stagnant Liquid

Effect of Plate Oscillation on Bubble Residence Time in an Aerated Stagnant Liquid

Gas Holdup from the Free Surface of Liquids Subjected to a Vertically Vibrating Plate

Optimization of semi‐pulsatile liquid‐liquid extraction operations in milli‐channels

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