R. Chouikh et al., Experimental study of the natural convection flow around an array of heated horizontal cylinders, RENEW ENERG, 21(1), 2000, pp. 65-78
Natural convection heat transfer from an array of heated cylinders has rece
ntly attracted much attention. However, in almost all of the investigations
, attention has been restricted to the influence of geometrical parameters
on the overall heat transfer. The present work deals with an experimental s
tudy of natural convection flow from a vertical array of two heated horizon
tal cylinders. A detailed analysis of the local temperature and velocity fi
elds is performed. The modifications of the average Nusselt number evolutio
n compared with the single cylinder are explained in terms of velocity and
temperature fields of the flow around the cylinders. Results that are obtai
ned for a variety of combinations of spacings and Rayleigh numbers are comp
ared with known numerical results. The comparison shows a satisfactory agre
ement, (C) 2000 Elsevier Science Ltd. All rights reserved.