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Critical angle of wet sandpiles
1999
Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
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We measure the increase in the maximum stable angle of a sandpile, c , with the volume fraction, , of a liquid added to cause cohesion between the grains. For two different liquids, tan c does not apparently scale with the air-liquid surface tension at low , whereas it does at higher . This suggests that the liquid forms menisci at asperities on the surfaces of the grains before filling cohesive menisci at intergrain contact points. In this cohesive limit, c () agrees with a surface roughness
doi:10.1103/physreve.60.r5044
pmid:11970452
fatcat:kwltkb6awncihedolv42kv246e