Simulation of grain drying in bins with partially perforated floors. I. Isotraverse lines
1992
Smith, E.A. | Jayas, D.S. | Muir, W.E. | Alagusundaram, K. | Kalbande, V.H.
When grain is dried in storage bins, the drying front will be a curved surface if only part of the floor is perforated. A method is developed for simulating the drying of grain, in these three dimensional situations, when the drying air is at near-ambient temperatures. In this first part of this article, the hypothesis that the lines of constant air traverse time are the lines of constant moisture content is examined. It is shown that these lines are equal when the air and grain are close to thermal and moisture equilibrium. For near-ambient drying, much of the grain bed is close to equilibrium so the isotraverse lines will be the lines of constant moisture content. Inside the drying front, however, the grain is not in equilibrium with the air so the result is not valid there. But it is shown experimentally that the leading and trailing edges of the drying front are lines of constant traverse time.
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