Chaos-Enhanced Transport and Aggregation in Chaotic Flows.

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)

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Document Details

Document Type
Technical Report
Publication Date
Apr 07, 1995
Accession Number
ADA293892

Entities

People

  • Julio M. Ottino

Organizations

  • Northwestern University

Tags

DTIC Thesaurus Topics

  • Advection
  • Air Force
  • Amplitude
  • Area Coverage
  • Aspect Ratio
  • Chemical Engineering
  • Flow
  • Fluids
  • Free Stream
  • Materials
  • Measurement
  • Mixing
  • Perturbations
  • Reynolds Number
  • Scientific Research
  • Transport Ships
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Combustion and Flow Dynamics.
  • Fluid Mechanics and Fluid Dynamics.
  • Theoretical Analysis.