Abstract
The knowledge of critical two-phase flow is very important in many engineering design problems. Several models have been developed in the past, in order to predict the critical flux of an evaporating fluid. These models are based on separated flow conditions in the fluid and use various criteria for the onset of critical flow. The present paper presents a method for the prediction of critical two-phase flow based on the positive entropy production principle, which emanates from irreversible thermodynamics. Use is being made of the Fanno lines and the onset of critical flow is characterized by the maximum entropy point, at constant mass flux. Vertical as well as horizontal pipes are examined. Also the cases of slip or nonslip conditions for the two fluids are incorporated in the model and the results are compared to experimental data. It appears that the proposed criterion with the other assumptions for the flow, yield very good agreement between the calculated and the experimental data.
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© 1983 Martinus Nijhoff Publishers, The Hague
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Michaelides, E.E. (1983). A Novel Approach for the Determination of Critical Two-Phase Flow. In: Kakaç, S., Ishii, M. (eds) Advances in Two-Phase Flow and Heat Transfer. NATO ASI Series, vol 64. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-6848-6_1
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DOI: https://doi.org/10.1007/978-94-009-6848-6_1
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-009-6850-9
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