Writing accurate equations requires accepting the point of view that the general equation of motion must describe the most general (turbulent) flow regime. The implementation of this point of view became possible by applying the operation of isolating the velocity rotor from the expressions for strain rates and from the Laplace operator of velocity. In this case, the second form of the equation was used for the total acceleration of a liquid particle in the Gromeka-Lamb form, which includes the angular velocity of rotation of the particles [4]. The equations are derived for continuous media in which shear stresses are described using strain rates in the corresponding plane - two models of a Newtonian fluid and one model of a non-Newtonian fluid with a power-law rheological law. Thus, the main task of the derivation was to find the term characterizing the influence of the viscous friction force on the turbulent flow regime. In any version of the derivation, the initial equation is the motion of a continuous medium in stresses.