Visualization of natural convection in ordered and disordered porous layers

Laurens E. Howle, Robert P. Behringer, John G. Georgiadis

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The recent Modified Shadowgraphic Technique is used to study pattern formation of convecting flows in fluid saturated porous layers. Both regular and random media are explored, each exhibiting distinct primary bifurcation behavior. In regular porous layers, consisting of grids of overlapping bars, the preferred wave pattern at onset is parallel rolls with roll orientation determined by bar orientation at the upper and lower boundaries. The random medium shows a different disorganized convection pattern with each cycling through the onset of convection. The experimental work is complemented by large scale numerical simulation of large aspect ratio convection in porous layers with uniform permeability and with spatially varying permeability. The influence of the permeability field on pattern selection is explored.

Original languageEnglish (US)
Title of host publicationExperimental and Numerical Flow Visualization
EditorsF.M. White
PublisherPubl by ASME
Number of pages9
ISBN (Print)0791810178
StatePublished - 1993
Externally publishedYes
EventProceedings of the 1993 ASME Winter Meeting - New Orleans, LA, USA
Duration: Nov 28 1993Dec 3 1993

Publication series

NameAmerican Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED


OtherProceedings of the 1993 ASME Winter Meeting
CityNew Orleans, LA, USA

ASJC Scopus subject areas

  • General Engineering


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