000216279 001__ 216279
000216279 005__ 20180913063557.0
000216279 0247_ $$2doi$$a10.1103/PhysRevE.93.012903
000216279 022__ $$a1539-3755
000216279 02470 $$2ISI$$a000367901000023
000216279 037__ $$aARTICLE
000216279 245__ $$aModel for the erosion onset of a granular bed sheared by a viscous fluid
000216279 260__ $$aCollege Pk$$bAmer Physical Soc$$c2016
000216279 269__ $$a2016
000216279 300__ $$a5
000216279 336__ $$aJournal Articles
000216279 520__ $$aWe study theoretically the erosion threshold of a granular bed forced by a viscous fluid. We first introduce a model of interacting particles driven on a rough substrate. It predicts a continuous transition at some threshold forcing theta(c), beyond which the particle current grows linearly J similar to theta - theta(c). The stationary state is reached after a transient time t(conv) which diverges near the transition as t(conv) similar to vertical bar theta - theta(c)|(-z) with z approximate to 2.5. Both features are consistent with experiments. The model also makes quantitative testable predictions for the drainage pattern: The distribution P(sigma) of local current is found to be extremely broad with P(sigma) similar to J/sigma, and spatial correlations for the current are negligible in the direction transverse to forcing, but long-range parallel to it. We explain some of these features using a scaling argument and a mean-field approximation that builds an analogy with q models. We discuss the relationship between our erosion model and models for the plastic depinning transition of vortex lattices in dirty superconductors, where our results may also apply.
000216279 700__ $$aYan, Le$$uNYU, Dept Phys, Ctr Soft Matter Res, New York, NY 10003 USA
000216279 700__ $$aBarizien, Antoine$$uEcole Polytech Univ, Paris, France
000216279 700__ $$0249400$$aWyart, Matthieu$$g263767$$uNYU, Dept Phys, Ctr Soft Matter Res, New York, NY 10003 USA
000216279 773__ $$j93$$k1$$q012903$$tPhysical Review E
000216279 909C0 $$0252562$$pPCSL$$xU13087
000216279 909CO $$ooai:infoscience.tind.io:216279$$pSB$$particle
000216279 917Z8 $$x173008
000216279 917Z8 $$x173008
000216279 937__ $$aEPFL-ARTICLE-216279
000216279 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000216279 980__ $$aARTICLE