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Journal of Enhanced Heat Transfer
Главный редактор: Zhixiong Guo (open in a new tab)
Founding Advisory Editor: Arthur E. Bergles (open in a new tab)
Редактор-основатель: Ralph L. Webb (open in a new tab)

Выходит 8 номеров в год

ISSN Печать: 1065-5131

ISSN Онлайн: 1563-5074

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 2.3 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 1.8 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.2 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00037 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.6 SJR: 0.433 SNIP: 0.593 CiteScore™:: 4.3 H-Index: 35

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Numerical Simulation on Heat Transfer Enhancement in Twisted-Tape-Inserted Tubes

Том 11, Выпуск 4, 2004, pp. 379-390
DOI: 10.1615/JEnhHeatTransf.v11.i4.160
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Краткое описание

To clarify the mechanism of heat transfer enhancement in swirl tubes, especially the effect of secondary flow generated in a pipe cross-section on temperature field mixing, numerical simulation of swirl flow under the laminar condition including a mixed convection region is performed. As the result of the simulation, the generation and development processes of secondary flow are visualized clearly, and it is clarified that these transitional processes depend on a twist ratio of swirl-tape γ and Reynolds (Re) number. Furthermore, these behaviors of secondary flow also greatly contribute to the heat removal performance, and the Nusselt (Nu) number becomes higher, especially if the secondary flow has some instability such as that found in the transition from one to two vortices. Numerical data on the heat transfer performance as well as the flow patterns show good agreement with conventional experimental results. On the other hand, it is shown that the transition process of secondary flow under a high heat flux condition is strongly affected by gravity effect, and its flow pattern and the local Nu number change periodically in a streamwise direction. By summarizing all the numerical data, a new prediction formula for the Nusselt number is constructed in wide Re, Prandtl (Pr), Grashof (Gr), and γ ranges, and it is shown that this formula almost corresponds to the conventional experimental results.

ЦИТИРОВАНО В
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  2. Cazan Radu, Aidun Cyrus K., Experimental investigation of the swirling flow and the helical vortices induced by a twisted tape inside a circular pipe, Physics of Fluids, 21, 3, 2009. Crossref

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  4. Eiamsa-ard S., Wongcharee K., Sripattanapipat S., 3-D Numerical simulation of swirling flow and convective heat transfer in a circular tube induced by means of loose-fit twisted tapes, International Communications in Heat and Mass Transfer, 36, 9, 2009. Crossref

  5. Eiamsa-ard S., Changcharoen W., Flow structure and heat transfer in a square duct fitted with dual/quadruple twisted-tapes: Influence of tape configuration, Journal of Mechanical Science and Technology, 29, 8, 2015. Crossref

  6. Abu-Khader Mazen M., An overview on tube inserts configurations and performances in tubular exchangers, World Journal of Engineering, 13, 2, 2016. Crossref

  7. Chaware Parag, Sewatkar C. M., Flow Transitions for Flow Through a Pipe With a Twisted Tape Insert, Journal of Fluids Engineering, 141, 11, 2019. Crossref

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