| Summary: | This study investigates the effect of radiation intensity on the drying of kaolin clay using a redesigned radiative-convective dryer set. The convective and hybrid drying curves are evaluated, and the radiant system is characterized through numerical and experimental analysis of the view factor profile and radiation contour by discrete ordinates model (DOM). The results demonstrate that radiation intensity and air velocity have a greater impact on the drying process than the air temperature. Notably, the air velocity is particularly influential at 2 m/s. A multivariate linear regression model is developed to represent the relationship between these variables with an R2 coefficient of determination of 82%. Under optimal hybrid drying conditions (air velocity: 2 m/s, air temperature: 40 °C, radiation intensity: 6.8 kW/m2), the mass flux is 15.1 times higher compared to convective drying conditions. Additionally, the discrete ordinates model accurately captures the behavior of radiation distribution in the 2D study, highlighting the need for further investigation in 3D to address magnitude of radiation deviations. These findings have significant implications for optimizing the drying process of kaolin clay and provide insights for the design of more efficient drying systems, as well as suggesting further research on the simulation and simplification of phenomena involving radiation heat transfer.
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