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Intruder dynamics in a 2D granular system: Effects of dynamic and static basal friction

ORAL

Abstract

We discuss the results of simulations of an intruder pulled through a 2D granular system by a spring, using a model designed to lend insight into the experimental findings described by Kozlowski et al. [Phys. Rev. E 100, 032905 (2019)]. In that previous study, the presence of basal friction between the grains and the base was observed to change the intruder dynamics from clogging to stick–slip. Here we first show that our simulation results are in excellent agreement with the experimental data for a variety of experimentally accessible friction coefficients governing interactions of particles with each other and with boundaries. We then use simulations to explore a broader range of parameter space, focusing on the friction between the particles and the base. We consider a range of friction coefficients, which are difficult to vary smoothly in experiments. The simulations show that dynamic friction strongly affects the stick–slip behavior when the coefficient is decreased below 0.1, while static friction plays only a marginal role.

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Presenters

  • Joshua Socolar

    Department of Physics & Center for Nonlinear and Complex Systems, Duke University, Durham, North Carolina 27708, USA, Department of Physics, Duke University, Duke University, Physics Department, Duke University

Authors

  • Joshua Socolar

    Department of Physics & Center for Nonlinear and Complex Systems, Duke University, Durham, North Carolina 27708, USA, Department of Physics, Duke University, Duke University, Physics Department, Duke University

  • C Manuel Carlevaro

    Instituto de Fisica de Liquidos y Sistemas Biologicos, CONICET, Argentina, Mechanical Engineering Department, Universidad Tecnologica Nacional, La Plata

  • Luis A Pugnaloni

    Departamento de Fisica, Universidad Nacional de La Pampa, CONICET, Argentina, Physics Department, Universidad Nacional de La Pampa

  • Ryan Kozlowski

    Physics Department, Duke University

  • Hu Zheng

    Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai, 200092, China, Tongji University, Shanghai, Department of Geotechnical Engineering, Geotechnical Engineering Department, Tongji University

  • Lou Kondic

    New Jersey Institute of Technology, New Jersey Inst of Tech, Department of Mathematical Sciences and Center for Applied Mathematics and Statistics, New Jersey Institute of Technology, Mathematical Sciences Department, New Jersey Institute of Technology, Chemical Engineering, New Jersey Institute of Technology