Физика

DETERMINATION OF THE RESISTANCE COEFFICIENT OF THE ROUND PIPELINE

The value of the resistance coefficient of the round pipeline with the arbitrary Reynolds number and degrees of roughness is known only from the experiment. With a consolidated solution, the author offers to obtain the solution of the Navier-Stokes equations and to define the influence of roughness on its solution on the basis of qualitative considerations. With an accuracy of 10%, the author made the classical Nikuradze’s graphs of dependence of resistance coefficient of a circular pipeline on the arbitrary Reynolds number with different degrees of roughness.