@Article{cmes.2020.09141,
AUTHOR = {Yong Guan, Wanling Hu, Yun Zhang, Kewei Song, Liangbi Wang},
TITLE = {Numerical Study of the Intensity Correlation between Secondary Flow and Heat Transfer of Circle Tube-Finned Heat Exchanger with Vortex Generators},
JOURNAL = {Computer Modeling in Engineering \& Sciences},
VOLUME = {123},
YEAR = {2020},
NUMBER = {1},
PAGES = {237--256},
URL = {http://www.techscience.com/CMES/v123n1/38492},
ISSN = {1526-1506},
ABSTRACT = {The application of vortex generators in tube-finned heat exchangers is very 
universal. The vortex generators can generate secondary flow, and as we all know 
secondary flow can obviously strengthen heat transfer. To use vortex generators much 
more efficiently in the circle tube-finned heat exchangers, the intensity correlation study 
between secondary flow and heat transfer is needed. 22 different structures of circle tubefinned heat exchangers were numerically studied, including the plain fin cases and the 
cases with vortex generators. In addition, the influence of fin spacing, transverse and 
longitudinal tube pitch, heights and attack angle of vortex generators, positions of vortex
generators and shape of vortex generators on heat transfer and fluid flow are studied, too. 
The non-dimensional parameter <i>Se</i> is applied to quantify the secondary flow intensity. 
The results show that <i>Se</i> can describe the secondary flow intensity very well. There is 
very close corresponding relationship between overall averaged <i>Nu</i> and volumetrically 
averaged <i>Se</i> for all the researched cases and the relational expression is obtained. 
However, there is no one-to-one correlation not only between <i>Re</i> and <i>f</i> but also between 
volumetrically averaged <i>Se</i> and <i>f</i> for all the studied cases.},
DOI = {10.32604/cmes.2020.09141}
}