摘要：A finite series composed of polynomic and hiperbolic terms is proposed as a fit for the radial profiles of axial velocities in pipe flows. Comparisons against experimental and numerical results from other authors prove the proposed fit to be a more-than-reasonable approximation for steady or transient and for laminar or turbulent flows. It is particularly adequate for evaluating transient wall shear stresses, and consequently, for evaluating transient friction losses. Besides the value these results may have on its own, the proposed fit is mainly intended to further improve a general numerical scheme for pressure transients in pipe flows presented by the authors in previous papers2,3.
