A model is developed describing the variation in regain along the direction of air flow in drying fibrous beds. The model is used to predict the moisture distribution in beds of wool and terylene fibers after drying for a given period of time. It is shown that empirical correction factors must be introduced for these predictions to be accurate. The reasons for this are examined and explanations are offered in terms of bed inhomogeneity and its effects on air flow. This work enables useful estimates of drying efficiency to be made, and prospects for further development of this line of investigation are discussed.
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