Authors : M. Zeroual , P. Cerisier and M. Zereg
Abstract: A study of the influence, in addition to the effect of the vertical and horizontal heat gradient, of higher and lower walls, on the natural convection in a cavity was made. We studied the behavior of the induced roll (rI) in contact of the heating side wall, as well as Benard rolls (rB) number and the evolution of the convective structure according to the heating side. This study concerns two different values of the horizontal walls conductivity (polycarbonate and glass). The vessel is a parallelepipedic cavity filled with silicone oil (Pr 880 at 25°C) and which comprises three walls subjected to different temperatures (higher and lower walls as well as small with dimensions side). According to the small side wall temperature the observed structure is a network of transverse rolls (Rayleigh-Benard convection), in case of the side heating absence and network of transverse rolls with induced roll (rI). The dilation of the (rI) as well as the process of rB destruction are a function of the heat flow on the level of the side wall.
M. Zeroual , P. Cerisier and M. Zereg , 2007. Experimental Study of Rayleigh-Benard Convection Destabilized by Heated Side Wall . Journal of Engineering and Applied Sciences, 2: 1048-1053.