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Journal of Enhanced Heat Transfer

Publication de 8  numéros par an

ISSN Imprimer: 1065-5131

ISSN En ligne: 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

Indexed in

Turbulent Heat Transfer Enhancement and Surface Heating Effect in Square Channels with Wavy, and Twisted Tape Inserts with Interrupted Ribs

Volume 7, Numéro 1, 2000, pp. 35-49
DOI: 10.1615/JEnhHeatTransf.v7.i1.40
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RÉSUMÉ

Regionally averaged heat transfer distributions and friction factors in square channels with hemi-circular wavy tape, hemi-triangular wavy tape, twisted tape inserts, and twisted tape inserts plus interrupted ribs are investigated. The effect of surface heating condition on heat transfer enhancement is also investigated. Each wall of the square channel is composed of isolated copper sections. Regionally averaged Nusselt number ratio, channel averaged Nusselt number ratio, and friction factor ratio in turbulent air flows are presented for Reynolds numbers from 10,000 to 70,000.
The results show that uneven surface heating enhances the heat transfer coefficient over uniform heating condition. Square channels with hemi-circular wavy tape (δ/D = 0.1) inserts produce a heat transfer coefficient three times higher than twisted tape inserts (H/D = 6) with almost 25 times the pressure drop penalty. Square channels with hemi-triangular or hemi-circular wavy tape (δ/D = 0.25) inserts produce almost a 2.5 times higher heat transfer coefficient than twisted tape inserts with 5 to 6 times pressure drop penalty. Square channels with twisted tape inserts plus interrupted ribs (e/D = 0.33) produce two times the heat transfer augmentation with four times pressure drop penalty over twisted tape inserts only. Square channels with twisted tape inserts plus interrupted ribs (e/D = 0.33) show the best overall heat transfer performance over other configurations.

CITÉ PAR
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