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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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Transitional Heat Transfer and Turbulent Characteristics of Drag-reducing Flow Through a Contracted Channel

Том 8, Выпуск 1, 2001, pp. 23-40
DOI: 10.1615/JEnhHeatTransf.v8.i1.30
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Краткое описание

Accompanying the significant reduction of drag of turbulent flow when a drag-reducing surfactant is used, there is a serious reduction of heat transfer, typically 80%. Since the drag reduction can be terminated by a large wall shear stress, the drag-reducing flow of surfactant solution has a special property of the diameter effect. Based on this, a contracted section was designed in a two-dimensional channel to control the drag-reducing flow of a surfactant solution so as to produce turbulence for heat transfer purposes when it passes through the contracted part at certain Reynolds numbers. The same level of turbulence intensity as that of water flow is approached when the surfactant solution passes through the contracted section at certain Reynolds numbers. The heat transfer coefficient thus achieves 70 to 80 percent of that of water flow in the contracted section. In the non-contracted section the friction drag keeps the low level as drag-reducing flow. It is shown that the termination of the drag-reducing effect of the surfactant solution within a heat exchanger is possible by using the present method. The studied surfactant solution is CTAC/NaSal/Water at the temperature of around 30°C with the concentration ranging from 30 ppm to 60 ppm.

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