ABSTRACT
The underlying physics that is essential for drying is briefly discussed in this chapter. To maintain consistency in the meaning of the terms, a brief discussion is presented for common terminology related to mass transfer. The critical moisture content is strongly affected by the morphology of the sample, the proportion of bound and free water, sample thickness, and drying conditions, among other things. The chapter provides a brief description of each mode to acquaint the reader with the basic mechanisms of heat transfer. The reader interested in more insight into the modes of heat transfer can consult numerous other sources available, including heat and mass transfer textbooks. Apart from a concentration gradient, convective mass transfer coefficient plays a significant role in overall convective mass transfer.
