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Heat Transfer Research

Publicou 18 edições por ano

ISSN Imprimir: 1064-2285

ISSN On-line: 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

Indexed in

Formation of Vortex Structures in a Vertical Enclosure with Finning of Its Both Walls

Volume 41, Edição 4, 2010, pp. 353-368
DOI: 10.1615/HeatTransRes.v41.i4.10
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RESUMO

One of the efficient methods of controlling heat transfer is the installation of barriers or fins on heat transfer surfaces. A numerical model of a free-convective flow and heat transfer in a high closed enclosure in the presence of fins on its isothermal side walls has been developed. The Navier-Stokes equations in two-dimensional statement were solved numerically. The influence of the height of the fins and of the spacing between them on the flow structure, local and average heat transfer was investigated. Calculations were carried out in the range of Rayleigh numbers Ra = 103−105 , when there exist laminar and multicellular regimes of convection. Two types of fins have been considered: adiabatic and with an infinitely high thermal conductivity. The effect of heat transfer rate decrease is equal to about 30% as compared to smooth walls. For heat-conducting fins heat transfer enhancement may reach 200% and above. Their influence on the aerodynamic and thermal structure was investigated in a number of experimental and computational works. It was shown earlier that installation of partitions in a square cavity may lead to a great decrease in the heat transfer rate. The effect of this decrease is attained due to the decrease in the intensity of air vortex flow in the cavity, therefore the enhancement of heat release is observed for both nonconducting and conducting partitions. The installation of fins on the side walls of high vertical enclosures leads to a substantially more complex structure of flow inside an enclosure. The average heat transfer rate for such conditions depends on a large number of parameters: the Rayleigh numbers, aspect ratio of an enclosure (A = H/L), spacing between fins (h), number of fins (n), as well on the fin height (l).
The aim of the present work was to numerically investigate a two-dimensional flow and heat transfer in a vertical finned enclosure and determination of the regimes with a lowered and intensified heat release. Since the thermal conductivity of fins has a strong effect on heat release, two-extreme cases are investigated in the work: nonconducting (adiabatic) fins and fins with an infinitely high thermal conductivity (λf → ∞). Thus, the limits of the influence of finning on the change in heat transfer with fins installed on the side surfaces in a vertical slit were determined.

CITADO POR
  1. Terekhov V. I., Ekaid A. L., Yassin K. F., Laminar free convection heat transfer and separated flow structure in a vertical channel with isothermal walls and two adiabatic opposing fins, Journal of Engineering Thermophysics, 26, 3, 2017. Crossref

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