Study of Navier-Stokes Equation Solution Taking into Account a Border Roughness and the Turbulent Mode

Value of round pipeline resistance coefficient for arbitrary Reynolds number and roughness degree are known only from experiment. It is proposed, using complex solution, to obtain a solution of Navier-Stokes equations and based on the qualitative reasons to define roughness influence on the solution of Navier-Stokes equation. It was possible to draw classical Nikuradze curves for round pipeline resistance coefficient versus Reynolds number and roughness degree with an accuracy of 10%.