A large number of chemical operations. biochemical or petrochemical industry is very depending on the rheological fluids nature. In this work. we study the case of highly viscous of viscoplastic fluids in a classical system of agitation: a cylindrical tank with plate bottom without obstacles agitated by gate impeller agitator. https://www.parisnaturalfoodes.shop/product-category/natural-eyes-pionhole-glasses-childrens/