Journal ArticleDOI
Oxygen transfer in the water-jet vessel
TLDR
In this paper, the gas holdup and volumetric mass transfer coefficient of a plunging water jet in an air-water system were investigated and it was shown that kLa is directly proportional to gas hold up in two regions.Abstract:
This is an investigation of the gas holdup and the volumetric mass transfer coefficient of a plunging water jet in an air-water system. We sound kLa to be directly proportional to gas holdup in two regions. For the first time, this has been clarified in the plunging liquid jet system. The volumetric mass transfer coefficient and the gas holdup have been well correlated in terms of the Froude number, liquid jet length, nozzle diameter and vessel diameter.read more
Citations
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Journal ArticleDOI
Gas entrainment by plunging liquid jets
TL;DR: An extensive survey of the results of possibly all available experimental and theoretical studies on gas entrainment by plunging liquid jets has been presented in this paper, where the following aspects of the phenomenon are thoroughly discussed: mechanisms, conditions, conditions of the onset of entrained gas, characteristics of the resulting bubble dispersion, and mass transfer.
Journal ArticleDOI
Study of the influence of air holes along length of convergent-divergent passage of a venturi device on aeration
M. Emin Emiroglu,Ahmet Baylar +1 more
TL;DR: In this paper, a negative pressure drew air in through holes at the convergent-divergent passage of the venturi device, which affected the water jet expansion, the air entrainment rate, and the bubble penetration depth and hence the oxygen transfer efficiency.
Journal ArticleDOI
Air entrainment and oxygen transfer in a venturi
Ahmet Baylar,M. E. Emiroglu +1 more
TL;DR: In this paper, a water jets can increase dissolved oxygen levels when the jet impact velocity exceeds a critical velocity, which is a prime indicator of the quality of water quality, and water jets are used to measure the dissolved oxygen content of water.
Journal ArticleDOI
Interfacial area and liquid-side volumetric mass transfer coefficient in a downflow bubble column
TL;DR: In this article, an experimental investigation was made to measure interfacial area, a, and liquid-side volumetric mass transfer coefficient, k L a, in a downflow bubble column by chemical methods viz., absorbing CO 2 in aqueous sodium hydroxide and sodium carbonate/bicarbonate buffer solution respectively.
Journal ArticleDOI
Air-Water Oxygen Transfer with Multiple Plunging Jets
TL;DR: In this paper, the volumetric oxygen transfer coeffi cient and oxygen-transfer effi ciency of multiple plunging jets in a pool of water for different confi gurations in terms of varying numbers of jets and jet diameters were studied experimentally.
References
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Journal ArticleDOI
Gas Holdup and Volumetric Mass Transfer Coefficient in Bubble Columns. Effects of Liquid Properties
Kiyomi Akita,Fumitake Yoshida +1 more
Journal ArticleDOI
Jet break-up and air entrainment by low velocity turbulent water jets
E. van de Sande,John M. Smith +1 more
TL;DR: In this paper, the authors developed equations for air entrainment by plunging water jets with velocities in the range between 2 and 5 m/sec. Energy considerations are shown to be a good basis for predictive equations.
Journal ArticleDOI
Surface entrainment of air by high velocity water jets
E. van de Sande,John M. Smith +1 more
TL;DR: In this paper, a theory of the aeration produced by the impact of a high speed water jet on a water surface is given, and the boundary conditions for the theory have a physical meaning.
Journal ArticleDOI
Gas bubble entrainment by plunging laminar liquid jets
Tong Joe Lin,Harold G. Donnelly +1 more
TL;DR: In this paper, the authors investigated the entrainment characteristics of laminar and turbulent jets of Newtonian liquids of varying physical properties by means of high-speed photography, and they showed that the entrainedness occurs only when the average jet velocity exceeds a certain critical value.
Journal ArticleDOI
Prediction of the volumetric mass transfer coefficient in pneumatic contactors
TL;DR: In this paper, semi-theoretical expressions for the prediction of the volumetric mass transfer coefficient, (KLaD)T, in pneumatic contactors, using the correlation of Calderbank and Moo-Young Chem. Engng Sci.