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Journal of Enhanced Heat Transfer
IF: 1.406 5-Year IF: 1.075 SJR: 0.287 SNIP: 0.653 CiteScore™: 1.2

ISSN Print: 1065-5131
ISSN Online: 1563-5074

Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.2012002706
pages 107-121

RISING LIQUID FILM INDUCED BY REWETTING AND HEAT TRANSFER ON THE SURFACE OF A FLUTED HELIX HORIZONTAL TUBE

Mei Ning
College of Engineering, Ocean University of China, Qingdao, 266100, People's Republic of China
Li Yan
College of Engineering, Ocean University of China, Qingdao, 266100, People's Republic of China
Wang Guirong
College of Engineering, Ocean University of China, Qingdao, 266100, People's Republic of China
Bai Yu
College of Engineering, Ocean University of China, Qingdao, 266100, People's Republic of China
Liu Xiaojun
College of Engineering, Ocean University of China, Qingdao, 266100, People's Republic of China

ABSTRACT

The objective of this work is to study rising liquid thin film formation induced by rewetting and heat transfer along a fluted helix channel on the surface of a horizontal tube. Heat transfer of a single-component liquid on the surface of a fluted helix horizontal tube is taken into consideration. A convectional test bed was developed and a numerical model was also established. The flow and temperature distributions can be obtained both mathematically and experimentally. The results show that the rising liquid film can uniformly cover the surface of the tube due to capillary-induced rewetting; a fluted helix tube with smaller pitches is better for the formation of the rising liquid film and can enhance heat transfer performance, the rising liquid film on the surface of a metallic mesh tube becomes more homogeneous and contributes to a higher heat convection coefficient with an increase in the amount of mesh, and the subcooled degree and mass flux make significant contributions to the convective heat transfer coefficient.


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