Turbulence scale profile in mixing layers of flows along a solid surface

The turbulence scale distribution in a mixing layer was studied analytically for the purpose of developing methods for computing the energy and mass exchange at the boundaries of flows spreading along solid surfaces. The distributions of the velocity, scale of turbulence, and friction stress were obtained from the system of Reynolds equations. The effect of the cocurrent flow was taken into account. The mixing-length profile, determined analytically for the first time, was similar to the double turbulence microscale curve. Theoretical distributions are in agreement with the measured ones.