Collect. Czech. Chem. Commun. 1988, 53, 1198-1216

Analytical description of the solid phase particle distribution in a mechanically agitated system

Marie Sýsováa, Ivan Fořtb and Vladimír Kudrnaa

a Department of Chemical Engineering, Prague Institute of Chemical Technology, 166 28 Prague 6
b Department of Chemical and Food Process Equipment Design, Czech Technical University, 166 07 Prague 6


A mathematical model of the solid particle random motion in a turbulent liquid flow was developed which resulted in an unconventional form of diffusion equation. The diffusion equation derived describes quantitatively the local extremes of the solid phase concentrations in the charge mixed which were verified experimentally. The comparison of the experimental and calculated distribution of local concentrations in the system shows an adequate qualitative agreement. The system consisted of a cylindrical conical-bottomed vessel with baffles and cylindrical draft-tube. A six-blade impeller with inclined (at α = 45° plane blades was used for agitating.