✦ LIBER ✦

On RTD for laminar flow in helical coils

✍ Scribed by A.K. Saxena; K.D.P. Nigam

Publisher: Elsevier Science
Year: 1979
Tongue: English
Weight: 183 KB
Volume: 34
Category: Article
ISSN: 0009-2509
DOI: 10.1016/0009-2509(79)85079-4

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✦ Synopsis

Shorter Commumcatlons 425 the effect of these unstable flow condltlons If, however, one neglects the above conslderatlons, it IS qmte reasonable to attnbute the decrease of the transfer coefficlent to the fact that a umform film flow IS approached as TOP or BOTTOM width increases, and the mass transfer coefficients approach the charactenstlc values obtamed with smooth tubes The results presented m Figs 5-7 are consistent with the earlier heat transfer studies [l, 21 mdlcatmg that finer grooves yteld higher transfer rates than the coarser ones Acknowledgements-The earher stages of this work and the development of the expenmental apparatus were supported by a grant from the US-Israel Bmatlonai Science Foundation (BSF) Jerusalem, Israel

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