Journal ArticleDOI
Correlating equations for natural convection heat transfer between horizontal circular cylinders
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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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Journal ArticleDOI
Natural convection heat transfer from horizontal concentric and eccentric cylinder systems cooling in the ambient air and determination of inner cylinder location
Ş. Özgür Atayılmaz,Hakan Demir,Mustafa Kemal Sevindir,Özden Ağra,Ismail Teke,Ahmet Selim Dalkılıç +5 more
TL;DR: In this article, the authors investigated the heat transfer characteristics of horizontal copper concentric cylinders in the case of natural convection and found that the inner cylinder had an electric heater to keep it at a constant temperature, while the annulus was filled with water.
Journal ArticleDOI
Convection thermique naturelle laminaire, permanente et bidimensionnelle dans des lunules cylindriques
TL;DR: In this article, the equations of steady, laminar two-dimensional thermal natural convection in a horizontal cylindrical lunula are written by using a two-cylindrical coordinate system, the stream function and the vorticity.
Book ChapterDOI
Energy Loss by Thermal Conduction and Natural Convection in Annular Solar Receivers
TL;DR: In this paper, a parabolic-cylindrical solar collector with a circular receiver tube enclosed by a concentric glass envelope and situated along the focal line of the parabolic trough reflector is described.
Journal ArticleDOI
Revisit on the scaling of the critical heat flux on cylinders
TL;DR: In this paper, a series of experimental data on CHF on small cylinders in normal gravity is presented and discussed, and it is conjectured that some other parameters in addition to the Bond number, play important roles in CHF with small Bond numbers.
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.