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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.
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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.

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Citations
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Proceedings ArticleDOI

Pool Boiling on Wire in Microgravity - What Have We Learned

TL;DR: In this article, steady pool boiling of degassed R113 on thin platinum wires has been studied systematically in our lab, including experiments in long-term microgravity aboard RS-22, in shortterm micro-gravity in the Drop Tower Beijing/NMLC, and in normal gravity on the ground.
Proceedings ArticleDOI

Subcooled pool boiling on thin wire in microgravity

TL;DR: In this article, a new set of experimental data of subcooled pool boiling on a thin wire in rnicrogravity aboard the 22nd Chinese recoverable satellite is reported.
Journal ArticleDOI

Heat Transfer in Double Annular due to Natural Convection

TL;DR: In this article, a 2D numerical simulation of turboprop engine cooling in the section of a gas turbine is presented, where the analysis is represented on a simplified double annular geometry, where inner tube represents the engine rotor, the middle tube represented the flow path and the outer ring replaces the engine case.
Book ChapterDOI

Optimum design parameters of horizontal coaxial cylinders for a solar energy collector

TL;DR: In this article, the optimum combinations of the design parameters of a solar collector system for thermal use of horizontal coaxial cylinders with a cylindrical parabolic mirror are discussed from the standpoint of exergy, collector efficiency and outlet temperature of a fluid.
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

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

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

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.
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