Introduction to basic principles of fluid motion. Steady and unsteady flow. Spacious (three dimensional), plane (two dimensional) and line structured problems (one dimensional) of fluid flow. The initial and boundary conditions. A trajectory of the material feed, streamline, transmission lines, the strain rate, power, spherical and deviatoric stress tensor, motor and deformation work. Definition of basic equations mass, momentum and energy conservation. Basic equations of heat transport. Connection between stress and strain in fluid. Navier Stokes equations. Compressibility of fluids. Laminar and turbulent flow. Averaging influence and flow separation. The effect of fluctuations in the main stream. Equations adapted to turbulent flow - Reynolds equations.