Inverse transition of turbulent flow to laminar flow

The present work examines the methods and results of a number of investigations into the phenomenon of inverse transition of turbulent flow into laminar flow, with special emphasis on the case of the pipe flow of a compressible fluid. A method is set forth for interpreting experimental data for transonic gas flows with a critical region characterized by large pressure and velocity gradients. It is shown that growth of the velocity gradient leads to increase of skin friction with simultaneous decrease of the turbulent viscosity coefficient.