Numerical study of developing laminar mixed convection in a heated annular duct with temperature dependent properties
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In this paper, the authors present a numerical simulation of the 3D laminar mixed convection between two concentric horizontal cylinders with physical properties which depend on temperature, where the outer cylinder is subjected to an internal energy generated by the Joule effect whereas the inner cylinder is adiabatic.Abstract:
This study presents a numerical simulation of the 3-D laminar mixed convection between two concentric horizontal cylinders with physical properties which depend on temperature. The outer cylinder is subjected to an internal energy generated by the Joule effect whereas the inner cylinder is adiabatic. The flow and thermal fields are modeled by the continuity, momentum, and energy equations with appropriate initial and boundary conditions using a cylindrical co-ordinate system. The model equations are numerically solved by a finite volume method with a second order accurate spatiotemporal discretization. For the considered geometric, dynamic and thermal controlling parameters, it is found that the transverse flow is always the cause of the circumferential variation of the temperature and the physical properties of the fluid. The phenomenon of the temperature stratification is highlighted and the vortices obtained lead to an improvement in the heat transfer quantified by the increase in the number of Nusselt. The obtained axial Nusselt number increases with the increased of Grashof number which is proportional to the heat flux imposed at the surface of the outer cylinder.read more
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Numerical Heat Transfer And Fluid Flow
TL;DR: The numerical heat transfer and fluid flow is universally compatible with any devices to read and is available in the authors' digital library an online access to it is set as public so you can get it instantly.
Journal ArticleDOI
Heat and Mass Transfer
TL;DR: The Thermophysical Properties Research Literature Retrieval Guide as discussed by the authors was published by Y. S. Touloukian, J. K. Gerritsen and N. Y. Moore.
Journal ArticleDOI
Double-diffusive natural convection in a cavity with an inner cylinder wrapped by a porous layer
Mourad Moderres,Toufik Benmalek,Aberkan Sofiane,Abderrahmene Ghezal,Said Abboudi,Abderrahmene Benbrik +5 more
TL;DR: In this paper, a numerical study of double-diffusive natural convection through an annular space delimited by a square cylinder on the outside and a cylindrical cylinder inside covered by a porous layer was performed.
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Double-diffusive natural convection in a cavity with an inner cylinder wrapped by a porous layer
TL;DR: In this article , the effects of simultaneously applied thermal and solutal buoyancy forces on heat and mass transfer are shown in the results for a large range of buoyancy ratios, Rayleigh number, and thermal conductivity.
References
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Numerical heat transfer and fluid flow
TL;DR: In this article, the authors focus on heat and mass transfer, fluid flow, chemical reaction, and other related processes that occur in engineering equipment, the natural environment, and living organisms.
Numerical Heat Transfer And Fluid Flow
TL;DR: The numerical heat transfer and fluid flow is universally compatible with any devices to read and is available in the authors' digital library an online access to it is set as public so you can get it instantly.
Journal ArticleDOI
Heat and Mass Transfer
TL;DR: The Thermophysical Properties Research Literature Retrieval Guide as discussed by the authors was published by Y. S. Touloukian, J. K. Gerritsen and N. Y. Moore.
Journal ArticleDOI
Correlating equations for laminar and turbulent free convection from a horizontal cylinder
TL;DR: In this article, a simple empirical expression for the mean value of Nu over the cylinder for all Ra and all Pr is developed in terms of the model of Churchill and Usagi.
Journal ArticleDOI
Flow patterns of natural convection in horizontal cylindrical annuli
TL;DR: Etudes numerique et experimentale d'ecoulements de convection naturelle dans des espaces annulaires concentriques and horizontaux.