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International Heat Transfer Conference 5

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

FRICTIONAL PRESSURE DROP AND CONVECTIVE HEAT TRANSFER OF GAS-LIQUID FLOW IN HORIZONTAL TUBES

Jurgen Bandel
Lehrstuhl und Institut fur Thermische Verfahrenstechnik der Universitat Karlsruhe, D 75 Karlsruhe 1, Kaiserstrasse 12 FR of Germany

Ernst U. Schlunder
Lehrstuhl und Institut fur Thermische Verfahrenstechnik der Universitat Karlsruhe, D 75 Karlsruhe 1, Kaiserstrasse 12 FR of Germany

DOI: 10.1615/IHTC5.460
pages 190-194

Abstract

Own Measurements of friction pressure drop and heat transfer for evaporating refrigerants in horizontal tubes were correlated by a new empirical method based on the corresponding single phase flow equations, which were extended by taking into account the interphase friction. A comparison of about 4000 friction pressure drop data in a wide range of two phase flow conditions showed the new method to cover all these data with a better accuracy than the methods of Lockhart-Martinelli and Chawla-Bankoff.

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