Calculation of turbulent friction on a plate with distributed injection of polymer solution into the boundary layer

An expression is proposed for the mixing length on a permeable surface with polymer injection. Relations between mixing length and injection, useful for calculating boundary layers into which dilute polymer solutions are injected, are proposed. The numerical solution is compared with the available experimental data.Translated from Izvestiya Akademii Nauk SSSR, Mekhanika Zhidkosti i Gaza, No. 2, pp. 169–171, March–April, 1991.Tha author wishes to thank V. A. Ioselevich for his interest in the work and V. A. Aleksin for useful comments on the numerical method.