1982 Volume 8 Issue 6 Pages 671-676
This paper deals with a method for predicting the drying characteristics of a coarse granular bed.
The method is based on the known relationship between capillary suction pressure and moisture content, and the static balance between capillary and gravity forces where the inertial effects are neglected for the estimation of moisture content distribution during the constant-rate drying period. It is proved that the present method is generally preferable for the granular bed of particle diameter larger than 200 μ.
Furthermore, the method is extended to estimation of the characteristic drying curve, the time required for complete drying and the critical moisture content in conductive drying, and the validity of these extensions is studied.