Effective Moisture Diffusivity Estimation from Drying Data
Makaleler > Tam Makale · 2007
Yazarlar: Abdülkadir Yağcioğlu, Vedat DEMİR, Tuncay GÜNHAN
Journal of Agricultural Machinery Science, Uluslararası, 2007
Özet
Drying is a complicated process of simultaneous heat and mass transfer.A significant number of mechanisms for moisture transportation within the porous solids have been proposed.Unfortunately, none of these mechanisms can be said to prevail throughout the total drying process.It seems that it is not possible to suggest a standard method for the evaluation of moisture diffusivity.However, moisture diffusivity estimation from drying kinetics data seem to provide more accurate results.This article presents the same simplified methods for determination of the effective diffussion coefficient of agricultural materials from experimental drying kinetics data.Each particular method is briefly described and also discussed by using experimental drying data.From these methods, Lewis's Simplified Method can be proposed for routine engineering calculations, where diffusivity can be represented by a mean constant value.In cases where diffusivity is strongly depended on moisture content, slope, MQM and a proper numerical method may provide the best results.