The study has as objective the optimization of the mixing process of products with variable viscosity by optimum chooses of function parameters.To achieve the objectives of this study it was made researches about the viscosity of non-Newtonian mixtures by S-L, propriety which characterise the homogenisation degree and power consumption.To realise the experimental researches, it was used a laboratory stand which allows the study of mixing process of non-Newtonian mixtures with variable viscosity.During the study it was made the simulation of mixing process hedged by ANSYS soft, based on the method of finite element.