The constant K (sometimes also denoted ) which arises in wall turbulence, in which mean velocity U is found to obey
where is the turbulent eddy velocity and A is another constant.
Monin-Obukhov Length, Wall Turbulence
References
Österlund, J. M. Experimental Studies of Zero Pressure-Gradient Turbulent Boundary-Layer Flow. Ph. D. thesis. Stockholm, Sweden: Department of Mechanics, Royal Institute of Technology, 1999.
Österlund, J. M.; Johansson, A. V.; Nagib, H. M.; and Hites, M. H. "A Note on the Overlap Region in Turbulent Boundary Layers." Phys. Fluids 112, 1-4, 2000.
Perry, A. E.; Hafez, S.; and Chong, M. S. "A Possible Reinterpretation of the Princeton Superpipe Data." J. Fluid. Mech. 439, 395-401, 2001.
Zargola, M. V. and Smits, A. J. "Mean Flow Scaling of Turbulent Pipe Flow." J. Fluid Mech. 373, 33, 1998.