Physical arguments and experimental evidence in support of the mesolayer theory of turbulence
Abstract
Experimental data are studied in light of the mesolayer theories of turbulence developed for a number of problems including flow in a pipe, the boundary layer at zero incidence, and the atmospheric boundary layer. The mesolayer theories take into account the presence of largescale eddies near the wall. The interaction of big eddies with the surface generate a second boundary layer, called the mesolayer, whose thickness, scaled on the friction velocity u sub tau and viscosity v, is proportional to R(1/2) = (u sub tau H/v)(1/2), where H is the outer length. Inside this layer, both viscosity and the outer length are important. The systematic deviation of mean velocity data about the logarithmic law in pipeflow and turbulent boundary layer is examined. It varies at R(1/2) and can be attributed to mesolayer effects. Analysis also strongly suggests that some quanities directly connected to the largescale eddies near the wall scale on the mesolayer thickness. The existence of the mesolayer between the inner and outer regions prevents the commonly assumed overlapthe logarithmic profile.
 Publication:

Ph.D. Thesis
 Pub Date:
 August 1981
 Bibcode:
 1981PhDT........62C
 Keywords:

 Turbulence;
 Turbulent Boundary Layer;
 Vortices;
 Atmospheric Boundary Layer;
 Fluid Dynamics;
 Friction;
 Incidence;
 Pipe Flow;
 Thickness;
 Viscosity;
 Fluid Mechanics and Heat Transfer