AC Diffusion: Transport in Porous Networks Subjected to Zero-Time-Average Advective Flow

J. J. Claria, G. H. Goldsztein, J. C. Santamarina

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Diffusion is a slow transport mechanism and advective transport tends to dominate in large-size systems. An alternative transport mechanism is explored herein, whereby zero time-average cyclic fluid flow is compounded with pore-scale mixing to render effective transport. Two one-dimensional cyclic flow cases are analyzed: a rigid porous network with two open boundaries subjected to cyclic flow through, and a compressible porous network with only one open boundary subjected to cyclic compression. The corresponding analytical models predict diffusion-like macroscale response and provide explicit expressions for the effective diffusion coefficients in terms of the microstructure of the porous medium and flow conditions. A parallel experimental study is conducted to corroborate analytical predictions. Results confirm the relevance of pore-scale mixing in cyclic flow as a transport mechanism in porous networks.

Original languageEnglish (US)
Pages (from-to)51-61
Number of pages11
JournalTransport in Porous Media
Issue number1
StatePublished - May 2012
Externally publishedYes


  • Dispersion
  • Porous media
  • Solute
  • Transport

ASJC Scopus subject areas

  • Catalysis
  • General Chemical Engineering


Dive into the research topics of 'AC Diffusion: Transport in Porous Networks Subjected to Zero-Time-Average Advective Flow'. Together they form a unique fingerprint.

Cite this