Library Subscription: Guest

ISSN Online: 2377-424X

ISBN Print: 0-89116-559-2

International Heat Transfer Conference 8
August, 17-22, 1986, San Francisco, USA

NUMERICAL PREDICTION OF NATURAL CONVECTION FROM A HORIZONTAL DISK

Get access (open in a dialog) DOI: 10.1615/IHTC8.3630
pages 441-446

Abstract

A detailed numerical study is presented which highlights the flow and thermal structure of the natural convection from a horizontal, heated disk embedded in an isothermal surface. The problem is formulated in terms of an inner and outer region where the inner region is assumed to consist of a nearly parallel flow. The outer region is characterized by the inviscid, isothermal entrainment of a resultant plume arising from the central portion of the disk. The velocity and temperature distributions are determined using a finite difference formulation. There is a decreasing effect of the outer region entrainment on the local heat transfer rate for increasing Grashof number. The extent of the inner region increases with increasing Grashof number. The surface integrated heat transfer coefficient has a 0.195 power law dependence on Grashof number. The heat transfer from the central region is weak.