Journal ArticleDOI
Correlating equations for natural convection heat transfer between horizontal circular cylinders
Reads0
Chats0
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
More filters
Journal ArticleDOI
Study of natural convection in horizontal annuli
TL;DR: In this article, the inner wall temperature is a function of diameter ratio and Rayleigh number, and a crescent-shaped eddy dominates for small diameter ratios and a kidney-shaped flow pattern appears for large diameter ratios.
Journal ArticleDOI
Detailed analysis of kinetic and fluid dynamic processes in diode-pumped alkali lasers
TL;DR: In this article, the effects of temperature rise, excitation of neutral alkali atoms to high lying electronic states and their losses due to ionization and chemical reactions, resulting in a decrease in pump absorption, slope efficiency, and lasing power are taken into account.
Journal ArticleDOI
Experimental investigation of nucleate boiling incipience with a highly-wetting dielectric fluid (R-113)
TL;DR: In this paper, experiments on pool boiling heat transfer in saturated R-113 at 1 atm pressure were conducted to investigate anomalies associated with the initiation of boiling using horizontal, 0.13 mm diameter chromel wires and a 0.51 mm diameter, platinum thin-film heater.
Journal ArticleDOI
Computer simulations of natural convection of single phase nanofluids in simple enclosures: A critical review
Omid Abouali,Goodarz Ahmadi +1 more
TL;DR: In this article, the authors show that the internal convection of single phase nanofluids in enclosures can be easily predicted theoretically with no need to perform a numerical simulation provided that a reliable Nusselt number correlation for clear fluids in these enclosures is available.
Journal ArticleDOI
On transient natural convection heat transfer in the annulus between concentric, horizontal cylinders with isothermal surfaces
Y. T. Tsui,B. Tremblay +1 more
TL;DR: In this article, the transient natural convection heat transfer problem between two horizontal isothermal cylinders is formed within the Boussinesq approximation and solved numerically through the vorticity-stream function approach.
References
More filters
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.