Computer modeling of column apparatuses: 3. Perturbation method approach

A new approach for the column apparatuses modeling is proposed. The method is based on the convection-diffusion-type models, which are obtained on the base of physical approximations of the mechanics of continua. The velocity distributions of fluids in column apparatuses are unknown practically and for a quantitative analysis of the processes must be created average concentrations models. All these new type models are characterized by the presence of small parameters at the highest derivatives. As a result, the use of MATLAB for solving the model differential equations is difficult. This difficulty is eliminated by three algorithms, using the perturbations method.