A non-local rheology for granular flows across yield conditions

By M. Bouzid, M. Trulsson, P. Claudin, É. Clément, Bruno Andreotti. 2013

178 citations recorded by the source corpus.

The rheology of dense granular flows is studied numerically in a shear cell controlled at constant pressure and shear stress, confined between two granular shear flows. We show that a liquid state can be achieved even far below the yield stress, whose flow can be described with the same rheology as above the yield stress. A non-local constitutive relation is derived from dimensional analysis through a gradient expansion and calibrated using the spatial relaxation of velocity profiles observed under homogeneous stresses. Both for frictional and frictionless grains, the relaxation length is found to diverge as the inverse square-root of the distance to the yield point, on both sides of that point.

Subfields: Civil and Structural Engineering, Computational Mechanics, Management, Monitoring, Policy and Law

View Paper: https://www.semanticscholar.org/paper/aa264b0289663f9876cca55c03bef34f8664d633

How researchers see this paper

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In Civil and Structural Engineering

1. Thomas Pahtz
2. Manousos Valyrakis
3. Orencio Durán
4. Abram H. Clark

In Computational Mechanics

1. Thomas Pahtz
2. Manousos Valyrakis
3. Orencio Durán
4. Abram H. Clark

In Management, Monitoring, Policy and Law

1. Thomas Pahtz
2. Manousos Valyrakis
3. Orencio Durán
4. Abram H. Clark

Citations in the corpus

• The Physics of Sediment Transport Initiation, Cessation, and Entrainment Across Aeolian and Fluvial Environments (2020, background): “The most successful theories [Kamrin and Koval, 2012; Henann and Kamrin, 2013; Kamrin and Henann, 2015; Bouzid et al., 2013, 2015] suggest that the cooperative length scale ξ diverges at the yield stress (i.e., ξ ∝ |µ − µs |−ν , where ν ≈ 0.5).”