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ISSN Online: 2377-424X

ISBN Print: 0-89116-299-2

International Heat Transfer Conference 7
September, 6-10, 1982, Munich, Germany

A STUDY OF BOILING HEAT AND MASS TRANSFER IN ANNULAR CREVICES

Get access (open in a dialog) DOI: 10.1615/IHTC7.3740
pages 29-34

Abstract

The results of studies of the boiling heat and mass transport processes in vertical concentric and eccentric closed ended annular crevices are presented. It was found that the heat transfer regime changes from nucleate boiling to transition boiling and then to an essentially adiabatic condition within a short distance below the top of the crevice. A chemical concentration test performed on the eccentric crevice geometry indicated that the nucleate boiling region adjacent to and immediately above the top of the crevice could produce the highest concentrations. Concentrations in this region were found to be increased by a factor of at least 20,000 compared to the bulk fluid. The concentric crevice heat transfer test data were also compared to the results of analytical models for predicting the wetted length within the crevice. A correlation based upon a superficial velocity flooding criterion was found to provide the best representation of the data.