The current article introduces a new tool to model drying kinetics. The perspective described here involves application of regimes originally used for heterogeneous reactions to quantify the reaction rate against the diffusional transfer of reactants. This method helps to determine the controlling steps in the falling and constant rate periods of drying and can be used as a base for advanced mathematical models. The proposed method can be used for solid/semisolid materials of varying dimensions. It addresses the research gap of the current unavailability of a universal technique to describe drying kinetics. The effect of parameters such as temperature, humidity, and the dominant mode of drying has been discussed with the help of a sample material (tomato). The effect of using different regimes for the variation of relative excess activation energy against the moisture content is also discussed. This approach showcases the "internal" character of the material and the kinetic model can be applied to different drying processes. The conditions under which transition between regimes may occur are also discussed and elaborated in terms of dimensionless numbers, such as the Hatta number and the Biot number.
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