Accession Number:

ADA509885

Title:

Dynamic Length-Scale Characterization and Nonequilibrium Statistical Mechanics of Transport in Open-Cell Foams

Descriptive Note:

Journal article

Corporate Author:

MONTANA STATE UNIV BOZEMAN DEPT OF MECHANICAL ENGINEERING

Report Date:

2009-01-01

Pagination or Media Count:

5.0

Abstract:

Nuclear magnetic resonance measurements of scale dependent dynamics in a random solid open-cell foam reveal a characteristic length scale for transport processes in this novel type of porous medium. These measurements and lattice Boltzmann simulations for a model foam structure indicate dynamical behavior analogous to lower porosity consolidated granular porous media, despite extremely high porosity in solid cellular foams. Scaling by the measured characteristic length collapses data for different foam structures as well as consolidated granular media. The nonequilibrium statistical mechanics theory of preasymptotic dispersion, developed for hierarchical porous media, is shown to model the hydrodynamic dispersive transport in a foam structure.

Subject Categories:

  • Statistics and Probability
  • Fluid Mechanics
  • Miscellaneous Materials

Distribution Statement:

APPROVED FOR PUBLIC RELEASE