Abstract
This study investigated the effect of dust deposition on the fin surfaces of a rectangular finned heat sink for natural convection. Therefore, experimental analysis was carried out on two cases, i.e., under fine dust and fiber dust conditions. The experiment was conducted inside a closed duct on the heat sink consisting of 17 fins. After analyzing the data and variation of temperature values at various positions of the fin surfaces, it was observed that the fine dust accumulation had a negligible effect on the thermal performance. However, fiber dust accumulation had a significant effect on the thermal performance. Moreover, the obtained values of Nusselt number were 26.68, 26.21, and 23.75 for natural convection under no dust, fine dust, and fiber dust conditions, respectively. Hence, the amount of heat dissipated by natural convection was minimal under fiber dust conditions.
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