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
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Journal ArticleDOI
Combination of projection and Galerkin finite element methods to solve the problem of free convection in enclosures with complex geometries
TL;DR: The results show that the convergence of this numerical method to solve the problem of free convec-tion in enclosures with complex geometries is acceptable, while there is no necessity to use upwind schemes.
Proceedings ArticleDOI
Thermal Design Approaches for Pipe-in-Pipe Tiebacks for the Transportation of HP/HT Oil and Gas
Book ChapterDOI
Solar thermal power plant
TL;DR: In this paper , the collector type and selection, optimization, relative movement of the earth and the sun, solar irradiation, heat transfer fluids, system optimization, energy conversion, and performance are the key analyses for the solar thermal power plant.
Proceedings ArticleDOI
Steady state and transient ampacities of gas-insulated transmission lines
TL;DR: In this paper, a thermal model for predicting the steady state and transient ampacities of gas-insulated transmission lines (GILs) is presented, and a computer program has been formulated such that it can estimate the ampacity of a GIL for any time-varying or constant current loading and any variation in environmental conditions.
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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.