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Heat Transfer Research
Импакт фактор: 0.404 5-летний Импакт фактор: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

ISSN Печать: 1064-2285
ISSN Онлайн: 2162-6561

Выпуски:
Том 50, 2019 Том 49, 2018 Том 48, 2017 Том 47, 2016 Том 46, 2015 Том 45, 2014 Том 44, 2013 Том 43, 2012 Том 42, 2011 Том 41, 2010 Том 40, 2009 Том 39, 2008 Том 38, 2007 Том 37, 2006 Том 36, 2005 Том 35, 2004 Том 34, 2003 Том 33, 2002 Том 32, 2001 Том 31, 2000 Том 30, 1999 Том 29, 1998 Том 28, 1997

Heat Transfer Research

DOI: 10.1615/HeatTransRes.2015005019
pages 1019-1038

CONJUGATE HEAT TRANSFER WITH VARIABLE FLUID PROPERTIES IN A HEATED HORIZONTAL ANNULUS

Sofiane Touahri
Energetic Physic Laboratory, Department of Physic, Faculty of Sciences, Mentouri University of Constantine, Algeria
Toufik Boufendi
Energetic Physic Laboratory, Department of Physic, Faculty of Sciences, Mentouri University of Constantine, Algeria

Краткое описание

In the present work, we numerically study the three-dimensional conjugate heat transfer in an annular space between two horizontal concentric cylinders; the outer cylinder is subjected to an internal energy generated by the Joule effect through its thickness while the inner is adiabatic. The thermal convection in the fluid domain is conjugated to the thermal conduction in the solid. The physical properties of the fluid are thermally dependent. The heat losses from the external outside pipe surface to the surrounding medium are considered. The model equations of continuity, momentum, and energy are solved numerically by a finite volume method with a second-order spatial-temporal discretization. The results obtained show the three-dimensional aspect of the thermal and dynamical fields with considerable variations of the viscosity and moderate variations of the fluid thermal conductivity. As expected, the mixed convection Nusselt number becomes more superior to that of forced convection when the Grashof number is increased. At the solid−fluid interface, the results clearly show the azimuthal and axial variations of the local heat flux and the local Nusselt numbers. Following these results, we have tried to model the average Nusselt number as a function of the Richardson number. With the parameters used, the heat transfer is quantified by the following correlation: NuA= 9.9130 Ri0.0816.


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