Models of Frictional Resistance for Circular Tubes in Rolling Motion

The forces affected on the laminar and turbulent flows in rolling motion were analyzed. The flowing models of laminar and turbulent flows were established on the basis of Navier-Stokes equation. The correlations of velocity and frictional resistance coefficient of laminar and turbulent flows in rolling motion were derived. The influence mechanism of rolling motion on the flowing characteristics of these flows was also investigated. The theoretical models were validated with experimental results. The theoretical results are consistent with experimental results.