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Journal of Enhanced Heat Transfer

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ISSN Druckformat: 1065-5131

ISSN Online: 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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EXPERIMENTAL INVESTIGATION ON HEAT TRANSFER AUGMENTATION IN HORIZONTAL TUBE USING COILED WIRE INSERTS

Volumen 26, Ausgabe 5, 2019, pp. 513-534
DOI: 10.1615/JEnhHeatTransf.2019029374
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ABSTRAKT

The increase in cost of energy and material has resulted in increased research for producing more efficient heat exchanging equipment. In this present work, the effects of coiled wire inserts with different cross-sections, on the heat transfer enhancement and friction factor characteristics of air flow through a horizontal pipe were studied. The experiment was conducted in a forced convection set-up using coiled wire inserts of different cross-sections, pitch, and thickness. The uniform heat flux condition was adopted for the turbulent flow, with Reynolds number (Re) ranging from 6400 to 15,200 and Prandtl number (Pr) being 0.7. The use of circular and square coiled wire inserts resulted in considerable increase in heat transfer as compared to a smooth tube at constant pumping power especially, at lower Reynolds number. The heat transfer augmentation ratio ranged from 1.6 to 2.9. The overall enhancement efficiency using coiled wires with square cross-section was about 10% more than that of coiled wires with circular cross-section for the same thickness and Reynolds number. A set of empirical correlations for Nusselt number and friction factor was also developed.

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