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Advances in Heat Transfer Engineering

ISBN 打印: 1-56700-198-1

BUBBLE BOILING IN FLOW OF ENVIRONMENT-FRIENDLY REFRIGERATING MEDIA

Abstract

In this paper, the author attempts to put forward a simplified description of the process of bubble boiling in a straight pipe. The two-phase one-component (liquid − vapour) system is treated as a continuum governed by the laws of conservation of energy, momentum and mass. The continuum is characterised by parameters that describe the two-phase system, such as density of the two-phase mixture, static void fraction or static equilibrium dryness fraction. In view of engineering applications, a one-dimensional model is used where physical quantities are cross-section averaged. This way the average velocity, pressure, temperature, and so on, are introduced.
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