Experimental study of the natural convection flow around an array of heated horizontal cylinders

Natural convection heat transfer from two horizontal cylinders at high Rayleigh numbers

“…They found that for small cylinder spacings, the Nusselt number on the upper cylinder was reduced compared to the Nusselt number of a single cylinder, whereas it was increased for larger S. For increasing Rayleigh numbers, the decrease for small spacings was smaller whereas the increase for larger spacings was larger. Chouikh et al [11] carried out experiments on a pair of vertically arranged horizontal cylinders in air in order to verify their numerical results, they reported that the agreement between the experimental and numerical results was satisfactory.…”

Numerical investigation of the laminar natural convection heat transfer from two horizontally attached horizontal cylinders

“…In such background, the studies conducted on the effect of their interactions thus also have been a basic work for the heat transfer from cylinders cooling by natural convection over the past several decades. For the case of a pair of or more equal-diameter heated horizontal cylinders arranged in a vertical configuration, there are abundant results to be available [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38]. A detailed review of these previous literatures is presented by Shyam et al [39], who have numerically analyzed the laminar natural convection heat transfer from a pair of horizontal cylinders aligned vertically in power-law fluids, spanning the range of Grashof number from 10 to 10 4 , the Prandtl number ranging from 0.72 to 100, the center-to-center separation distances as 2 6 S=D 6 20, and the power-low index 0:3 6 n 6 1:5, where the values for n < 1 correspond to the shear-thinning fluids, n ¼ 1 represents the Newtonian behavior, whereas n > 1 is the shear-thickening fluids.…”

Natural convection around a horizontal heated cylinder: The effects of vertical confinement

“…However when the space between the cylinders increased, the heat transfer at the bottom of the cylinder was elevated. More recently, Chouikh et al [16] performed an experimental study of the natural convection flow around 2 heated horizontal cylinders in air. Chouikh et al [16] reported that the flow field varies with Rayleigh number.…”

“…More recently, Chouikh et al [16] performed an experimental study of the natural convection flow around 2 heated horizontal cylinders in air. Chouikh et al [16] reported that the flow field varies with Rayleigh number. It was observed that at the higher Rayleigh numbers considered (10 4 compared to 10 2 ), the majority of the flow comes from the sides instead of bottom.…”