Accession Number : AD0425829

Title :   APPROXIMATIONS FOR STEADY-STATE ISOTROPIC TURBULENCE,

Corporate Author : NEW YORK UNIV N Y

Personal Author(s) : Kraichnan,Robert H.

Report Date : SEP 1963

Pagination or Media Count : 14

Abstract : The direct-interaction approximation for turbulence maintained by stationary, isotropic, random stirring forces is formulated in the wavenumberfrequency domain. Further, simplifying approximations are made. The final equations involve the wavenumber energy-spectrum, a characteristic correlation frequency for each wavenumber, and a characteristic response frequency for each wavenumber. A relation is exhibited between the simplified equations and a Fokker-Planck type approximation recently proposed by S. F. Edwards. (Author)

Descriptors :   (*TURBULENCE, ISOTROPISM), FREQUENCY, ENERGY, CORRELATION TECHNIQUES, EQUATIONS, ELECTRICAL PROPERTIES, FUNCTIONS(MATHEMATICS), NUMERICAL ANALYSIS, SHEAR STRESSES, VISCOSITY, PRESSURE, DENSITY, NUMERICAL INTEGRATION, PERTURBATION THEORY

Distribution Statement : APPROVED FOR PUBLIC RELEASE