Collect. Czech. Chem. Commun. 1986, 51, 1910-1924

A probability form of the diffusion equation and its use to describe the distribution of the solid phase particle concentrations in a mechanically agitated charge

Vladimír Kudrna, Marie Sýsová and Ivan Fořt

Department of Chemical Engineering, Prague Institute of Chemical Technology, 166 28 Prague 6


An attempt is made in this paper to describe the solid particle motion in a flowing (agitated) incompressible liquid on the assumption that this motion may be considered as a diffusion Markov process. It is shown that such a procedure leads to a relation which differs from the diffusion equation commonly used in chemical engineering by the form of diffusion term. The expression proposed, unlike the relation usually used, makes it possible to describe the local concentration extremes of solid phase in the charge mixed.