Numerical and experimental study of heat transfer in a tall vertical closed cavity

Experimental and Numerical Investigation of Convection Heat Transfer in an Enclosure With a Vertical Heated Block and Baffles

“…The results show small influence in Tw with the change in the baffle width 5 cm to 10 cm. For all the cases, the variation of average Nusselt number (Nu) with heat flux (q) at Re = 0, 5650 is depicted in Figure (14). The block with partially cut baffles improves the Nu compared with the other models.…”

“…The experimental value of average heat transfer coefficient is given by the following mathematical relationship [14].…”

“…They found that Nu increases as a function of Ra. Armando et al [14] conducted numerical and experimental studies on vertical cavity, where its vertical wall receives heat flux, the opposite wall is kept at a constant temperature, and its remaining walls are assumed to be adiabatic. The change in wall emissivity from 0.03 to 0.95 increases the heat transfer coefficient from 119.9% to 159.9%.…”

On numerical modelling of conjugate turbulent natural convection and radiation in a differentially heated cavity

“…The only 3D investigation with a RANS model considered a cavity of a very high aspect ratio of 20 [20]. To the best knowledge of the authors, conjugate natural convection with radiation in 3D cavities of low aspect ratios (e.g., $1) has not been studied using the RANS models.…”

“…They found that the predicted temperatures at the mid-width of the cavity for surface emissivities of e ⁄ = 0.9 (3D) and e ⁄ = 0.58 (2D) had a good agreement. Piña-Ortiz et al [20] also used a low Reynolds number k-e model to conduct a numerical study of combined turbulent natural convection and surface thermal radiation in a 3D tall cavity (with an aspect ratio of 20) with two emissivity values for the walls (0.3 and 0.95 respectively). Their simulation results of the average Nusselt numbers and heat transfer coefficient are in a good agreement with experimental data.…”