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睦廷均,車岷煥 서울市立大學校 1990 論文集 Vol.24 No.-
To obtain a more simplified method for analyzing the dewatering mechanism of particulate beds in gravitational field the conventional equation for flow in capillaries is empirically modified in view of the existence of filmwise liquid. A simple equation for prediction the average saturation vs, the time is presented, by considering the beds as an assembleage of circular monosize capillaries determined from packed bed porosity and particle size. The progress of dewatering process can be followed using local saturation data measured throughout depth of the bed by means of the electrical conductivity, and good agreement has generally been found between computed and experimental data. It is obtained in terms of the average saturation and Zeitz number(Nzt). ??