TY - JOUR
T1 - Experimental studies of stratification in a granular Hele—Shaw cell
AU - Makse, Hernán A.
AU - Havlin, Shlomo
AU - King, Peter R.
AU - Stanley, H. Eugene
PY - 1998/5
Y1 - 1998/5
N2 - We show that, when a mixture of small and large grains is simply poured in a ‘granular Hele—Shaw cell’ (two transparent slabs separated by a gap of about 5 mm), the grains spontaneously stratify in alternating layers of small and large grains parallel to the surface of the pile. The spontaneous self-stratification occurs only when the large grains have a larger angle of repose than the small grains do. Conversely, we obtain only spontaneous self-segregation, that is the large grains are found preferentially near the bottom of the cell while the small grains are found near the top, when the large grains have a smaller angle of repose than the small grains. The observed stratification might be of relevance to explain similar stratified patterns observed in Aeolian rocks.
AB - We show that, when a mixture of small and large grains is simply poured in a ‘granular Hele—Shaw cell’ (two transparent slabs separated by a gap of about 5 mm), the grains spontaneously stratify in alternating layers of small and large grains parallel to the surface of the pile. The spontaneous self-stratification occurs only when the large grains have a larger angle of repose than the small grains do. Conversely, we obtain only spontaneous self-segregation, that is the large grains are found preferentially near the bottom of the cell while the small grains are found near the top, when the large grains have a smaller angle of repose than the small grains. The observed stratification might be of relevance to explain similar stratified patterns observed in Aeolian rocks.
UR - http://www.scopus.com/inward/record.url?scp=0032072926&partnerID=8YFLogxK
U2 - 10.1080/13642819808205027
DO - 10.1080/13642819808205027
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AN - SCOPUS:0032072926
SN - 1364-2812
VL - 77
SP - 1341
EP - 1351
JO - Philosophical Magazine B: Physics of Condensed Matter; Statistical Mechanics, Electronic, Optical and Magnetic Properties
JF - Philosophical Magazine B: Physics of Condensed Matter; Statistical Mechanics, Electronic, Optical and Magnetic Properties
IS - 5
ER -