Non-local effects in intermediate granular avalanching flows
ORAL
Abstract
In this work we showed that photoelastic analysis allows the quantification of rheologies in an intermediate chute flow. We characterize stresses and velocities in a flow layer with regions below and above the yield ratio mu_s. We compare our experimental results with a nonlocal rheology. Preliminary results show that the timescale over which the force chains decorrelate is strongly associated with the inverse of the fluidity, a viscosity-like quantity. This provides a physical interpretation of its particle-scale origins.
*This work was made possible by the support of an IFPRI collaborative grant. NMV is supported by a Royal Society Dorothy Hodgkin Research Fellowship RG 70273, ALT is funded by a Royal Society Research Grant RG 73329 and the Cambridge International Trust and KED acknowledges support from the James S. McDonnell foundation.
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Presenters
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Nathalie Vriend
- University of Cambridge