Effect of an interstitial fluid on the dynamics of three-dimensional granular media
arXiv:1808.03150 · doi:10.1103/PhysRevE.99.032905
Abstract
The propagation of mechanical energy in granular materials has been intensively studied in recent years given the wide range of fields that have processes related to this phenomena, from geology to impact mitigation and protection of buildings and structures. In this paper, we experimentally explore the effect of an interstitial fluid on the dynamics of the propagation of a mechanical pulse in a granular packing under controlled confinement pressure. The experimental results reveal the occurrence of an elastohydrodynamic mechanism at the scale of the contacts between wet particles. We describe our results in terms of an effective medium theory, including the presence of the viscous fluid. Finally, we study the nonlinear weakening of the granular packing as a function of the amplitude of the pulses. Our observations demonstrate that the softening of the material can be impeded by adjusting the viscosity of the interstitial fluid above a threshold at which the elastohydrodynamic interaction overcomes the elastic repulsion due to the confinement.
arXiv comment10 pages, 8 figures
References in corpus (14)
- Granular Packings: Nonlinear elasticity, sound propagation and collective relaxation dynamics
- Strongly nonlinear waves in a chain of Teflon beads
- How Hertzian solitary waves interact with boundaries in a 1-D granular medium
- High-speed ultrasound imaging in dense suspensions reveals impact-activated solidification due to dynamic shear jamming
- Out-of-contact elastohydrodynamic deformation due to lubrication forces
- Stokes' Cradle: Newton's Cradle with Liquid Coating
- Shock Waves in Weakly Compressed Granular Media
- Liquid morphologies and capillary forces between three spherical beads
- Dynamic weakening by acoustic fluidization during stick-slip motion
- Softening of Granular Packings with Dynamic Forcing
- Mechanical impulse propagation in a packing of 3D spheres confined at constant pressure
- Influence of Controlled Viscous Dissipation on the Propagation of Strongly Nonlinear Waves in Stainless Steel Based Phononic Crystals
- Elastohydrodynamic wake and wave resistance
- Accretion Dynamics on Wet Granular Materials