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ISSN Online: 2377-424X

ISBN Print: 0-85295-345-3

International Heat Transfer Conference 10
August, 14-18, 1994, Brighton, UK

ON THE MECHANISM OF DISPERSED FLOW HEAT TRANSFER IN THE CIRCULAR BEND

Get access (open in a dialog) DOI: 10.1615/IHTC10.1360
pages 503-508

Abstract

This paper presents experimental and theoretical study of dispersed flow heat transfer in the 90-degree circular bend. Heat transfer mechanism is analyzed from measurements of phase distribution and heat transfer together with theoretical examination of single-phase flow heat transfer and droplet dynamics. It is revealed that due to the substantial change in droplet dynamics and phase distribution, dispersed flow heat transfer is remarkably improved in the bend. Two heat transfer patterns of different mechanisms are identified, namely the heat transfer under non-rewetting status and under rewetting status. The former maintains the characters of film boiling, whereas the latter is governed by partial or total liquid film evaporation.