Drying Models, Myths, and Misconceptions

Several fallacies commonly appear in articles or papers on drying. They fall into two main categories: inadequate or discredited theory which continues to be repeated, and theoretical models which are too complex for practical use, generate results in the wrong form, or do not take account of measurement limitations. Cases are highlighted where published theory is inadequate (e.g., Page's equation) and where simplified models can have better fitness for purpose than complex ones (e.g., in fluidized bed drying). The universal drying curve (UDC) is a useful concept for rapid evaluation of drying in deep well‐mixed beds.