Force and flow transition in plowed granular media.

We use plate drag to study the response of granular media to localized forcing as a function of volume fraction ϕ. A bifurcation in the force and flow occurs at the onset of dilatancy ϕc. Below ϕc rapid fluctuations in the drag force F(D) are observed. Above ϕc fluctuations in F(D) are periodic and increase in magnitude with ϕ. Velocity field measurements indicate that the bifurcation in F(D) results from the formation of stable shear bands above ϕc which are created and destroyed periodically during drag. A friction-based wedge flow model captures the dynamics for ϕ>ϕc.

• Publication year

  2010

• Venue

  Physical Review Letters

• Publication date

  2010-08-24

• Fields of study

  Medicine, Physics, Environmental Science

• Identifiers
  DOI 10.1103/PhysRevLett.105.128301arXiv 1008.4118PMID 20867678
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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