Velocity distribution in a turbulent flow

The article considers the issue of velocity distribution in a turbulent flow. logarithmic profile obtained on basis semiempirical theory turbulence by L. Prandtl is given. A comparison calculations for various dependencies with measurement data performed. It shown that calculated show discrepancy each other and experimental data. study hydraulic characteristics water flows required to solve problems supply disposal, engineering construction, regulation riverbed processes environmental monitoring bodies. uniform uneven flow need be clarified, will possible due theoretical background hydraulics hydrodynamics. Despite usage modern computer technologies, creation an actual still not complete. separation fluid motion into molar basic led non-closed system equations motion, slowed down further progress search solution most widely used semi-empirical Prandtl, based phenomenological approach links averaged use technology has allowed us obtain new require analysis generalization. dependences developed models, including well-known profiles are compared significant quantitative, sometimes qualitative, was revealed. between results calculating different requires additional critical accuracy reliability authors performing studies under conditions using mutually agreed method. low effectiveness considered statistical approaches leads develop represent combination some concepts