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2016 Numerical Simulation of Bubble Coalescence and Break-Up in Multinozzle Jet Ejector
Dhanesh Patel, Ashvinkumar Chaudhari, Arto Laari, Matti Heiliö, Jari Hämäläinen, Kishorilal Agrawal
J. Appl. Math. 2016: 1-19 (2016). DOI: 10.1155/2016/5238737

Abstract

Designing the jet ejector optimally is a challenging task and has a great impact on industrial applications. Three different sets of nozzles (namely, 1, 3, and 5) inside the jet ejector are compared in this study by using numerical simulations. More precisely, dynamics of bubble coalescence and breakup in the multinozzle jet ejectors are studied by means of Computational Fluid Dynamics (CFD). The population balance approach is used for the gas phase such that different bubble size groups are included in CFD and the number densities of each of them are predicted in CFD simulations. Here, commercial CFD software ANSYS Fluent 14.0 is used. The realizable k-ε turbulence model is used in CFD code in three-dimensional computational domains. It is clear that Reynolds-Averaged Navier-Stokes (RANS) models have their limitations, but on the other hand, turbulence modeling is not the key issue in this study and we can assume that the RANS models can predict turbulence of the carrying phase accurately enough. In order to validate our numerical predictions, results of one, three, and five nozzles are compared to laboratory experiments data for Cl2-NaOH system. Predicted gas volume fractions, bubble size distributions, and resulting number densities of the different bubble size groups as well as the interfacial area concentrations are in good agreement with experimental results.

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Dhanesh Patel. Ashvinkumar Chaudhari. Arto Laari. Matti Heiliö. Jari Hämäläinen. Kishorilal Agrawal. "Numerical Simulation of Bubble Coalescence and Break-Up in Multinozzle Jet Ejector." J. Appl. Math. 2016 1 - 19, 2016. https://doi.org/10.1155/2016/5238737

Information

Received: 26 October 2015; Accepted: 22 December 2015; Published: 2016
First available in Project Euclid: 13 April 2016

zbMATH: 07037285
MathSciNet: MR3470470
Digital Object Identifier: 10.1155/2016/5238737

Rights: Copyright © 2016 Hindawi

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