期刊
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
卷 48, 期 3, 页码 762-770出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cep.2008.09.007
关键词
Tube insert; Heat transfer enhancement; Computational Fluid Dynamics; Modeling
This paper reports experimental and Computational Fluid Dynamics (CFD) investigations on the friction factor, Nusselt number and thermal-hydraulic performance of a tube equipped with the classic and three modified twisted tape inserts. The results showed that the Nusselt number and performance of the jagged insert were higher than other ones. Maximum increase of 31% and 22% were observed in the calculated Nusselt and performance of the jagged insert as compared with those obtained for the classic one. The higher turbulence intensity of the fluid close to the tube wall has been expressed as the main reason for the experimental observations. (c) 2008 Elsevier B.V. All rights reserved.
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