Journal ArticleDOI
Correlating equations for natural convection heat transfer between horizontal circular cylinders
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TLDR
In this paper, a conduction boundary-layer model is used for heat transfer by conduction, laminar flow and turbulent flow. Butler et al. obtained a correlation for convection from a free horizontal cylinder as the outer cylinder diameter becomes infinite and for quasi-steady heat transfer to fluid within a horizontal cylinder.About:
This article is published in International Journal of Heat and Mass Transfer.The article was published on 1976-10-01. It has received 257 citations till now. The article focuses on the topics: Churchill–Bernstein equation & Heat transfer.read more
Citations
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ReportDOI
Comparison of CFD Natural Convection and Conduction-only Models for Heat Transfer in the Yucca Mountain Project Drifts
T. Hadgu,S. Webb,M. Itamura +2 more
TL;DR: In this article, the authors compare the results of CFD natural convection simulations and conduction-only calculations that used the equivalent thermal conductivity to represent heat transfer by turbulent natural convections.
Cooling by Free Convection at High Rayleigh Number of Cylinders Positioned Above a Plane
TL;DR: In this paper, free convection cooling of isothermal circular cylinders positioned above a horizontal plane is investigated numerically, using a commercial Computational Fluid Dynamics (CFD) software package.
Natural Convection Reduction in a Composite Air/Porous Annular Region With Horizontal
TL;DR: In this paper, the authors deal with a numerical investigation on natural convection heat transfer in along horizontal annular region formed with a heated inner cylinder and a cooled outercylinder, which is divided into two subregions: a thicker outer subregion is saturated with a porous material saturated by air, whereas a thinner inner subregion was clear.
Dissertation
Solar gasification of biomass: design and characterization of a molten salt gasification reactor
TL;DR: In this paper, Davidson et al. presented a Ph.D. dissertation on Mechanical Engineering at the University of Minnesota with a focus on the application of machine learning to the field of Mechanical Engineering.
Journal ArticleDOI
On Gaseous Free-Convection Heat Transfer With Well-Defined Boundary Conditions
TL;DR: The scaling of free convection heat transfer is investigated in this paper, where the boundary conditions are defined for heat exchange between the cylinder and the enclosure rather than the cylinder itself and an arbitrarily chosen fluid region.
References
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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
A general expression for the correlation of rates of transfer and other phenomena
Stuart W. Churchill,R. Usagi +1 more
TL;DR: The expression Y = (1 + Zn)1/n where Y and Z are expressed in terms of the solutions for asymptotically large and small values of the independent variable is shown to be remarkably successful in correlating rates of transfer for processes which vary uniformly between these limiting cases as discussed by the authors.
Journal ArticleDOI
An experimental and theoretical study of natural convection in the annulus between horizontal concentric cylinders
TL;DR: In this paper, an experimental and theoretical-numerical investigation has been carried out to extend existing knowledge of velocity and temperature distributions and local heat-transfer coefficients for naturel convection within a horizontal annulus.
Book ChapterDOI
A General Method of Obtaining Approximate Solutions to Laminar and Turbulent Free Convection Problems
G. D. Raithby,K.G.T. Hollands +1 more
TL;DR: In this paper, the authors focus on determining equations for the local and mean rate of laminar heat transfer, which are approximately valid for different geometries by use of these equations, several new correlations are obtained for various heat transfer problems, and the results compared with experiments.
Journal ArticleDOI
Laminar free convection in boundary layers near horizontal cylinders and vertical axisymmetric bodies
D. A. Saville,S. W. Churchill +1 more
TL;DR: In this paper, the problem of describing free convection near either horizontal cylinders or vertical axisymmetric bodies with fairly arbitrary body contours is studied and the solutions of two coupled, coupled, partial differential equations, for the temperature and stream functions, are represented by series which are universal with respect to body shapes within a specified class of body shapes.