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Multiphase Science and Technology
SJR: 0.124 SNIP: 0.222 CiteScore™: 0.26

ISSN Print: 0276-1459
ISSN Online: 1943-6181

Multiphase Science and Technology

DOI: 10.1615/MultScienTechn.v6.i1-4.20
pages 5-13

COMPARISONS OF PREDICTIONS WITH EXPERIMENTAL DATA SET NO.1: PRESSURE DROP AND ENTRAINED FRACTION IN FULLY DEVELOPED FLOW

Theo G. Theofanous
Center for Risk Studies and Safety, University of California, Santa Barbara, 6740 Cortona Drive, Goleta, CA-93117, California, USA
W. H. Amarasooriya
Department of Chemical and Nuclear Engineering, University of California, Santa Barbara, CA 93106

ABSTRACT

Comparisons are reported between predictions and experiments for fully developed air-water flow in a vertical tube (Data Set No. 1, G.F. Hewitt and D.G. Owen, Multiphase Science & Technology, Vol. 3, pp.145-154, 1987). The participants in the calculations were M. Hirano, T. Watanabe, H. Kamo, H. Osaki, H. Inoue, F. Tanabe, M. Akimoto (JAERI), A. H. Govan, G. F. Hewitt, D. G. Owen (Harwell), A. H. Govan, P. B. Whalley (UK AEA Harwell/University of Oxford), S. Gao, D. C. Leslie (Queen Mary College, London), L. N. Persen (NTNU Trondheim). Very large discrepancies occur between the predictions themselves and between the predictions and experiments. It is concluded that taking into account waves and turbulence effects in both core and film is necessary to improve the modelling.


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