Abstract
ABSTRACT Experiments and simulations for dielectrically-assisted drying of a nonhygroscopic material that exhibits negligible capillary moisture transfer have been conducted in order to ascertain phenomena associated with the transient drying process. Results and predictions indicate that, in general, dielectrically-assisted drying is characterized by three drying regimes. An initial regime occurs in which the material is heated convectively and dielectrically, followed by a transition regime and ultimately, a final regime during which the material is dielectrically heated and convectively cooled. During the final regime, an inverted temperature distribution in the material induces internal condensation which influences transport rates and the thermal response of the system. Measured and predicted drying histories are bracketed by algebraic expressions derived from simple energy balances under a range of conditions where volumetric dielectric heating is strong, relative to surface convective heating or co...
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