Natural Convection from Hotizontal Finite Length Isothermal Circular Cylinders
Author : M. M. Yovanovich
Publisher :
Page : pages
File Size : 14,23 MB
Release : 1999
Category :
ISBN :
Author : M. M. Yovanovich
Publisher :
Page : pages
File Size : 14,23 MB
Release : 1999
Category :
ISBN :
Author : Sandra K. S. Boetcher
Publisher : Springer
Page : 57 pages
File Size : 12,68 MB
Release : 2014-08-05
Category : Science
ISBN : 3319081322
This book presents a concise, yet thorough, reference for all heat transfer coefficient correlations and data for all types of cylinders: vertical, horizontal, and inclined. This book covers all natural convection heat transfer laws for vertical and inclined cylinders and is an excellent resource for engineers working in the area of heat transfer engineering.
Author : Enoch IfeanyiChukwu Nwizu
Publisher :
Page : 172 pages
File Size : 45,8 MB
Release : 1963
Category : Heat
ISBN :
Author : Majid Charmchi
Publisher :
Page : 480 pages
File Size : 14,36 MB
Release : 1981
Category : Heat
ISBN :
Author : Thomas Howard Kuehn
Publisher :
Page : 602 pages
File Size : 20,32 MB
Release : 1976
Category : Heat
ISBN :
Author : James A. Liburdy
Publisher :
Page : 39 pages
File Size : 44,41 MB
Release : 1980
Category :
ISBN :
A mathematical formulation of the governing equations for transient natural convection in a finite length horizontal cylinder is developed and constructed in finite difference form. The boundary conditions consist of radial heat flux for a specified thermal resistance, axial heat flux from one closed end and three different conditions at the other end to represent exposure to a hot convecting gas environment. The formulation is expressed in terms of the vorticity equations, energy equation and a set of vector potential equations. Solution is by the alternating direction implicit method for the vorticity and energy equations and the successive over relaxation method for the vector potential equations. Numerical experiments were run using the model to determine the local wall heat flux and the local wall temperatures. A heat transfer correlation is presented in terms of the Nusselt and Rayleigh numbers. Steady state conditions are obtained for the nondimensional time approximately equal to .005. Circumferential heat transfer coefficient variations are shown with larger values occurring near the top of the cylinder. Axial coefficients vary within approximately 10 percent with the largest values occurring near the center of the cylinder. With respect to test conditions at the AEDC facility, the convective components appear to be less than 10 percent of the radiative heat flux to the cylinder walls when a high temperature gas (air) is enclosed in the cylinder.
Author :
Publisher :
Page : 568 pages
File Size : 43,22 MB
Release : 1973
Category : Mechanics, Applied
ISBN :
Author :
Publisher :
Page : 402 pages
File Size : 39,67 MB
Release : 1999
Category : Thermodynamics
ISBN :
Author :
Publisher :
Page : pages
File Size : 10,94 MB
Release : 1984
Category :
ISBN :
The natural convection heat transfer between arrays of horizontal, heated cylinders and their isothermal, cooled enclosure was experimentally investigated. Four different cylinder arrays were used: two in-line and two staggered. Four fluids (air, water, 20 cs silicone, and 96% glycerine) were used with Prandtl numbers ranging from 0.705 to 13090.0. There was no significant change in the Nusselt number between isothermal and constant heat flux conditions of the cylinder arrays. The average heat transfer coefficient was most affected by the spacing between cylinders and the total surface area of the cylinder arrays. The enclosure reduced the expected increase in both the average and the local heat transfer coefficients caused by changing the inner body from an in-line arrangement to a staggered arrangement of comparable spacing. An increase in fluid viscosity reduced the influence of the geometric effects.
Author : Muthukumar Palanisamy
Publisher : Springer Nature
Page : 505 pages
File Size : 35,60 MB
Release : 2021-03-09
Category : Technology & Engineering
ISBN : 9813341653
This book presents select proceedings of the International Conference on Innovations in Thermo-Fluid Engineering and Sciences (ICITFES 2020). It covers topics in theoretical and experimental fluid dynamics, numerical methods in heat transfer and fluid mechanics, different modes of heat transfer, multiphase flow, fluid machinery, fluid power, refrigeration and air conditioning, and cryogenics. The book will be helpful to the researchers, scientists, and professionals working in the field of fluid mechanics and machinery, and thermal engineering.