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Computational Thermal Sciences: An International Journal

Publicado 6 números por año

ISSN Imprimir: 1940-2503

ISSN En Línea: 1940-2554

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: 1.5 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 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: 0.3 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: 0.00017 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: 0.28 SJR: 0.279 SNIP: 0.544 CiteScore™:: 2.5 H-Index: 22

Indexed in

EFFECT OF PRANDTL NUMBER ON FREE CONVECTION IN NEWTONIAN AND POWER-LAW FLUIDS FROM A CYLINDER ADJACENT TO AN ADIABATIC WALL

Volumen 8, Edición 1, 2016, pp. 73-98
DOI: 10.1615/ComputThermalScien.2016015847
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SINOPSIS

Steady two-dimensional natural convection heat transfer from a horizontal cylinder situated above or beneath an adiabatic wall is numerically studied. The governing differential equations have been solved over wide ranges of dimensionless parameters, namely, Grashof number (10 ≤ Gr ≤ 104), Prandtl number (5 ≤ Pr ≤ 100) and power-law index (0.2 ≤ n ≤ 1), for a range of gaps between the cylinder and the adiabatic wall, ΙH/DΙ = 0.05, 0.2, 0.5, 0.9, 1.1, 1.5, 3, and 5. Limited results were also obtained for large values of (H/D) ≥ 3000 to approach the unconfined cylinder limit. Detailed discussion of the momentum and heat transfer phenomena is presented in terms of the streamlines, velocity field, isotherms, and the Nusselt number. The effect of the Prandtl number is more pronounced when the cylinder is close to the wall and this effect gradually diminishes as the gap increases. The average Nusselt number shows a positive dependence on the values of the Grashof and Prandtl numbers. With reference to the value of the Nusselt number for an unconfined cylinder, the presence of the adiabatic wall, above or below the cylinder, has an adverse influence on heat transfer. Indeed, the influence of the wall persists up to large values of the gap between the wall and the cylinder. The present results on the average Nusselt number have been reconciled in the form of a single correlation for the both top and bottom confinements.

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