Laboratory study of the growth of a turbulent layer of fluid

An experiment was designed to measure the position of a front separating turbulent and nonturbulent fluid as the front moves away from an oscillating grid located near the plane z=0. The theory predicts D∝ (Kt)1/2, where D is the distance of the front from z=0, t=0 is time at which the oscillation begins, and K is a quantity of the dimensions and character of eddy viscosity, called the ’’action’’ of the idealized plane energy source that replaces the grid in the theoretical model. The experimental results support the theory.