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Heat Transfer Research

Published 18 issues per year

ISSN Print: 1064-2285

ISSN Online: 2162-6561

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: 1.7 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: 1.4 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: 0.6 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: 0.00072 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: 0.43 SJR: 0.318 SNIP: 0.568 CiteScore™:: 3.5 H-Index: 28

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Influence of Torsion on the Laminar Flow and Convective Heat Transfer in Coiled Tubes Arranged in a Rectangular Pattern

Volume 41, Issue 5, 2010, pp. 493-508
DOI: 10.1615/HeatTransRes.v41.i5.10
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ABSTRACT

A detailed numerical investigation has been undertaken to understand the intricacies of laminar forced flows with convective heat transfer inside coiled tubes of circular cross section. The coiled tubes consist of two straight parts and two bends which are arranged in a rectangular pattern. The laminar flows are characterized by three different Reynolds numbers: Re = 300, 700, and 1400. Computer simulations to calculate the laminar velocity and temperature fields were performed for four coiled tubes having different bend torsion ratios. Compared to the coiled tubes near the entrance of the first bend, the rotation experienced by the fluid motion due to torsion is less significant in the second bend. This behavior is attributable to the flow redevelopment in the upstream straight tube. The numerical results demonstrate a vigorous fluid rotation for flows possessing higher velocities whose magnitudes are given by Re = 700 and 1400. The flow path in the bend is representative of a typical flow near the entrance region of a helically coiled tube. The numerical predictions agree well with those results generated by numerical computations and experimental observations. Overall, the heat transfer coefficient decreases with increments in the bend torsion; this behavior is caused primarily by the weakening in the secondary flows.

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