Accession Number : ADA293892

Title :   Chaos-Enhanced Transport and Aggregation in Chaotic Flows.

Descriptive Note : Final technical rept. 15 Nov 93-14 Nov 94,

Corporate Author : NORTHWESTERN UNIV EVANSTON IL

Personal Author(s) : Ottino, Julio M.

PDF Url : ADA293892

Report Date : 07 APR 1995

Pagination or Media Count : 6

Abstract : Chaos-enhanced transport in cellular flows - such as those generated within cavities by a top free-flowing stream - are studied with the long term objective of devising means to increase the rate of transport between surfaces and bulk flows. In several experimental cavities chaotic advection is generated by periodic modulation of the free stream velocity. We find that transport occurs only near reattachment points of wall-attached streamlines. Detailed local measurements of transport in these regions places upper bounds on global transport rates in the cavity. The buildup of mixed area is measured and exit manifolds for lower cells are identified. (AN)

Descriptors :   *CHAOS, *MIXING, *CAVITATION, KINEMATICS, VELOCITY, FOURIER TRANSFORMATION, GLOBAL, EXPERIMENTAL DATA, TIME DEPENDENCE, DEFORMATION, TIME SERIES ANALYSIS, CAVITIES, FLOW VISUALIZATION, TRANSPORT, PERTURBATIONS, MODULATION, FREE STREAM, ADVECTION, STREAMFLOW ANALYSIS, FLUID FLOW.

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE