Bubble size in two-phase gas-liquid bubbly flow in ducts

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Authors

Colleges, School and Institutes

Abstract

The bubble diameter in two-phase flows is an important factor in determining the momentum, mass and heat transfer between the phases. In this paper we consider two main methods of prediction and, in the experimental measurements, take particular care to prevent surface contamination. We report average bubble diameters in bubbly flow for different gas-liquid systems in ducts of 7-, 10.9- and 13.2-mm diameter, smaller ducts, and larger energy dissipation rates, than generally used. The systems were mainly air-water and air-1-hexanol with limited measurements for air-perfluorohexane. The two theories are a simple equation previously proposed by Winterton and Obry, and Hinze's theory, which requires a method of calculating the two-phase energy dissipation. The method is explained and then applied to our own data and also to an extensive compilation of water data in the literature. (C) 2001 Elsevier Science B.V. All rights reserved.

Details

Original languageEnglish
Pages (from-to)437-447
Number of pages11
JournalChemical Engineering and Processing
Volume40
Publication statusPublished - 1 Sep 2001