Abstract
The skeleton shape of the Kelvin cell plays a significant role in influencing forced convective heat transfer behaviors, and it can be tailored to enhance overall heat transfer performance (OHTP). To this end, this study conducted a comprehensive experimental and numerical comparison of the Kelvin cells (KC), Kelvin cells with elliptical skeletons (ES), and Kelvin cells with reversed elliptical skeletons (RES) to elucidate the hydraulic and thermal characteristics. The findings indicated that the pressure drop and the overall Nuseelt number of the ES is 53.0 % and 8.2 % lower than those of the KC. Consequently, the area goodness factor, which serves as an indicator of the OHTP, is 105.5 % higher in the ES compared to the KC. Conversely, the RES does not exhibit a significant advantage in the aforementioned parameters. The reduced energy loss attributable to the presence of elliptical skeletons enhances the hydraulic performance of the ES. Furthermore, the smaller recirculation area on the leeward side of the elliptical skeleton promotes improved heat transfer near the heat substrate. The ES has advantage in the fin efficiency compared with KC. The 1.25 cell height is a significant reference value for the development of heat transfer device with Kelvin cell.
Published Version
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