Granular Fingers on Jammed Systems: New Fluidlike Patterns Arising in Grain-Grain Invasion Experiments

by: SF Pinto, MS Couto, APF Atman, SG Alves, AT Bernardes, HFV de Resende, EC Souza

Physical Review Letters, Vol. 99, No. 6. (2007)

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Abstract

In this Letter we report spontaneous pattern formation in dense granular assemblies confined to a Hele-Shaw cell and quasistatic regime. Varied unexpected patterns, ranging from rounded to fingered, are observed due to the displacement of one granular material by another. Computer simulations reproduce the major features observed in these experiments. Two mechanisms are responsible for the pattern formation: crystallization of the injected grains and plastic deformation of the displaced grains. The experiment suggests analogies with viscous fingering and jamming transition experiments.

@article{citeulike:2552961, abstract = {In this Letter we report spontaneous pattern formation in dense granular assemblies confined to a Hele-Shaw cell and quasistatic regime. Varied unexpected patterns, ranging from rounded to fingered, are observed due to the displacement of one granular material by another. Computer simulations reproduce the major features observed in these experiments. Two mechanisms are responsible for the pattern formation: crystallization of the injected grains and plastic deformation of the displaced grains. The experiment suggests analogies with viscous fingering and jamming transition experiments.}, author = {Pinto, S. F. and Couto, M. S. and Atman, A. P. F. and Alves, S. G. and Bernardes, A. T. and de Resende, H. F. V. and Souza, E. C. }, citeulike-article-id = {2552961}, doi = {10.1103/PhysRevLett.99.068001}, journal = {Physical Review Letters}, keywords = {2007, grains, jamming}, number = {6}, posted-at = {2008-03-18 21:06:08}, priority = {2}, publisher = {APS}, title = {Granular Fingers on Jammed Systems: New Fluidlike Patterns Arising in Grain-Grain Invasion Experiments}, url = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal\&id=PRLTAO000099000006068001000001\&idtype=cvips\&gifs=yes}, volume = {99}, year = {2007} }

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TY - JOUR ID - citeulike:2552961 L3 - citeulike-article-id:2552961 TI - Granular Fingers on Jammed Systems: New Fluidlike Patterns Arising in Grain-Grain Invasion Experiments JF - Physical Review Letters VL - 99 IS - 6 PB - APS N2 - In this Letter we report spontaneous pattern formation in dense granular assemblies confined to a Hele-Shaw cell and quasistatic regime. Varied unexpected patterns, ranging from rounded to fingered, are observed due to the displacement of one granular material by another. Computer simulations reproduce the major features observed in these experiments. Two mechanisms are responsible for the pattern formation: crystallization of the injected grains and plastic deformation of the displaced grains. The experiment suggests analogies with viscous fingering and jamming transition experiments. KW - 2007 KW - grains KW - jamming AU - Pinto, SF AU - Couto, MS AU - Atman, APF AU - Alves, SG AU - Bernardes, AT AU - de Resende, HFV AU - Souza, EC PY - 2007/// UR - http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRLTAO000099000006068001000001&idtype=cvips&gifs=yes ER -

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