Nikuradse found from his measurements of turbulent flow in smooth pipes that the eddy viscosity maximum occurs midway between the pipe wall and the center line. It is shown that a velocity‐defect law for a similar flow leads to the same result.

1.
J. Nikuradse, Verein Deutscher Ingenieure‐Forschungsheft No. 356 (1932).
2.
J. Laufer, NACA Technical Report 1174 (1954).
3.
A. S. Monin and A. M. Yaglom, Statistical Fluid Mechanics: Mechanics of Turbulence (MIT Press, Cambridge, Mass., 1971), Vol. 1, p. 298.
4.
H. Schlichting, Boundary‐Layer Theory (McGraw‐Hill, New York, 1968), 6th ed., p. 561.
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© 1979 American Institute of Physics.
1979
American Institute of Physics
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