CERTAIN PROBLEMS WITH THE APPLICATION OF STOCHASTIC DIFFUSION-PROCESSES FOR THE DESCRIPTION OF CHEMICAL-ENGINEERING PHENOMENA - DYNAMIC-STOCHASTIC MODEL OF FLOW MIXER

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