Collect. Czech. Chem. Commun. 1994, 59, 1551-1570

Certain Problems with the Application of Stochastic Diffusion Processes for the Description of Chemical Engineering Phenomena. Dynamic Stochastic Model of Flow Mixer

Vladimír Kudrnaa, Libor Vejmolab and Pavel Hasala

a Department of Chemical Engineering, Prague Institute of Chemical Technology, 166 28 Prague 6, Czech Republic
b OIS SPOLANA Inc., 277 11 Neratovice, Czech Republic


The one-dimensional stochastic diffusion model of a continuous flow mixer is proposed incorporating (contrary to commonly used diffusion models) a distribution of velocities of diffusing particles. Simplifying assumptions enabled us to derive an analytical expression for the liquid residence time distribution and concentration profile inside the mixer. For extreme values of parameters, the model becomes identical with the common idealized models usually adopted in chemical engineering.