Accession Number : AD0656089

Title :   INVESTIGATION OF A THEORY FOR THE STRUCTURE OF THE VISCOUS SUBLAYER IN WALL TURBULENCE,

Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF AEROSPACE ENGINEERING

Personal Author(s) : Elswick,Roy Cassel , Jr

Report Date : JUN 1967

Pagination or Media Count : 92

Abstract : Based on the assumption of equilibrium of the average rate of change of the total turbulent energy, differential eigenvalue equations for the structure of finite-amplitude disturbances invariant in the streamwise direction are obtained. The minimum viscous sublayer thickness is determined using a simplified form of the equations. The minimum critical thickness non-dimensionalized by shear velocity and kinematic viscosity is found to be 4.69. The numerical results are also compared with the measurements in the sublayer by Bakewell (1966). It is suggested that the so-called 'energy-containing range' of the spectrum may be associated with the large eddy structure. (Author)

Descriptors :   (*TURBULENT BOUNDARY LAYER, THEORY), WALLS, MATHEMATICAL ANALYSIS, VISCOSITY, TURBULENCE, INCOMPRESSIBLE FLOW, SHEAR STRESSES, VORTICES, ENERGY

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE