NUMERICAL SIMULATION OF FREE CONVECTION
OF A HEAT-RELEASING FLUID IN AN AXISYMMETRIC CLOSED VOLUME

D. G. Grigoruk, P. S. Kondratenko,
and D. V. Nikol'skii

UDC 536.24

A simplified computing method has been developed and on 
its basis the problem on laminar free convection of a heat-releasing 
fluid in a cylindrical and a hemispherical volumes with an isothermal 
lateral (in the case of a hemisphere, lower) and adiabatic upper bounds 
has been solved. On the basis of the results obtained the influence 
of the temperature stratification in the volume and geometry on the 
heat transfer characteristics has been investigated. It has been established 
that neglecting the temperature stratification leads to a considerable 
overestimation of the density of heat flow to the boundary in the 
lower part of the volume.

Institute for Problems of Safe Development of Nuclear 
Power Engineering, RAS, 52 Bol'shaya Tul'skaya Str., Moscow, 115191; 
email: grig@ibrae.ac.ru. Translated from Inzhenerno-Fizicheskii Zhurnal, 
Vol. 81, No. 2, pp. 280-289, March-April, 2008. Original article 
submitted March 13, 2006.