An experimental study of the local evolution of moist substrates under jet impingement drying

In this paper the thermal, water activity and moisture depletion histories have been measured in a food substrate, due to localized heating by a turbulent air jet impingement, to infer on the inherent driving forces and transport phenomena. It is evident that strong non-uniformity may exist in the substrate so that a local analysis as the reported one is necessary to help reach optimal processing.