TY  - JOUR
TI  - COMPREHENSIVE REVIEW ON THE FLOW CHARACTERISTICS OF TWO-PHASE FLOWS IN INCLINED TUBES
AB  - This paper presents a comprehensive review of research works on condensation and boiling heat transfercharacteristics in horizontal, vertical and inclined tubes both smooth and enhanced. Although there are manystudies examining two-phase flows inside tubes, it is almost impossible to find such a comprehensive study fortwo-phase flow in tubes. Moreover, while number of the studies concerning condensation or boiling inside tubesare limited, the present study covers almost all studies of condensation and boiling inside inclined tubes. Previousstudies are classified into many subtitles according to configuration (horizontal, vertical or inclined) and roughness(smooth or enhanced) as well as aim of the study (researching the effect of parameters on the heat transfercoefficient, pressure drop or evaluation of prediction correlation). Such a wide range of classification and scopehave no done before. Condensation and boiling phenomena are of great importance in heat exchangers, coolingsystems, etc. due to their wide utilization in those devices. Additionally, two-phase flow and the associated heattransfer are becoming increasingly important in industrial applications because the heat transfer coefficient in twophase flows is much higher than in single-phase flows. In this research, major topics such as heat transfer, pressuredrop, friction factor and void fraction were studied using active and passive techniques in the literature.The fluids used in the reviewed studies diverse in a very wide range. For pure refrigerants (singlecomponent-fluorocarbon refrigerant), R11, R12, R22, R32, R-113, R123, R-124, R125, R134, R134a, R142b,R152a, R236fa, R245fa, R-600a, R1234ze, R1234yf and for zeotropic blend refrigerants, a mixture of two or morecomponents having different boiling points, R410A, R404A, R407C, R447A are used. As zeotropic blendrefrigerants, a mixture of two or more components that boil at the same temperature, R502. Besides, water (steamfor condensation), FC72, CFC 113, Propane, HFE 7000 (1-methoxyheptafluoropropane), R744 (CO2), and liquidnitrogen are involved in researchers’ studies.In the present review, effects of parameters on two-phase flow heat characteristics are evaluated. Basedon the evaluation, it can be drawn that inclination angle have significant effect on both condensation and boilingheat transfer coefficient and pressure drop. On the other hand, it was found that vapour quality and roughness werethe main parameters affecting two-phase flow heat transfer characteristics. Effects of all parameters are discussedin the corresponding section. When existing correlations in the literature on prediction flow boiling heat transfercoefficient are evaluated, correlations proposed by Müller-Steinhagen and Heck [103] and Friedel [113] were tobe best for prediction well according to majority of researchers and for performance of prediction on pressure dropcorrelation by Müller-Steinhagen and Heck [103] stood out.
AU  - MEYE, Josua
AU  - Dalkilic, Ahmet Selim
AU  - ince, ibrahim timuçin
AU  - Acikgoz, Ozgen
AU  - KARADEMİR, Hakan
AU  - Wongwises, Somchai
AU  - ÖZÇELİK, Güven
PY  - 2021
JO  - Journal of Thermal Engineering
VL  - 7
IS  - 3
SN  - 2148-7847
SP  - 483
EP  - 549
DB  - TRDizin
UR  - http://search/yayin/detay/452122
ER  -