Accession Number : ADA192134

Title :   Direct Numerical Simulations of the PDF's (Probability Density Functions) of a Passive Scalar in a Forced Mixing Layer,

Corporate Author : FLOW RESEARCH CO KENT WA

Personal Author(s) : Givi, P ; McMurtry, P A

PDF Url : ADA192134

Report Date : Sep 1987

Pagination or Media Count : 16

Abstract : The probability density functions of a passive scalar quantity are calculated in a perturbed mixing layer by means of direct numerical simulations. The results indicate that the two-dimensional rollup of the unsteady shear layer, and the pairing process in particular, contributes greatly to the generation of the predominant peak of the PDF's within the mixing region. Keywords: Probability density functions; Direct numerical simulation; Mixing layers; Coherent structures; Entrainment.

Descriptors :   *PROBABILITY DENSITY FUNCTIONS, *MIXED LAYER(MARINE), *TURBULENCE, COHERENCE, LAYERS, MATHEMATICAL MODELS, MIXING, PASSIVE SYSTEMS, PERTURBATIONS, QUANTITY, REGIONS, SCALAR FUNCTIONS, STRUCTURES, DIGITAL SIMULATION, ENTRAINMENT

Subject Categories : Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE