Bouncing of a projectile impacting a dense potato-starch suspension layer
arXiv:1904.11627 · doi:10.1063/1.5095678
Abstract
When a solid projectile is dropped onto a dense non-Brownian-particle suspension, the action of an extremely large resistance force on the projectile results in its drastic deceleration, followed by a rebound. In this study, we perform a set of simple experiments of dropping a solid-projectile impact onto a dense potato-starch suspension. From the kinematic data of the projectile motion, the restitution coefficient and timescale of the rebound are measured. By assuming linear viscoelasticity, the effective transient elasticity and viscosity can be estimated. We additionally estimate the Stokes viscosity on a longer timescale by measuring the slow sinking time of the projectile. The estimated elastic modulus and viscosity are consistent with separately measured previous results. In addition, the effect of mechanical vibration on the viscoelasticity is examined. As a result, we find that the viscoelasticity of the impacted dense suspension is not significantly affected by the mechanical vibration.
arXiv comment9 pages, 9figures
References in corpus (17)
- Discontinuous Shear Thickening of Frictional Hard-Sphere Suspensions
- Shear thickening in concentrated suspensions: phenomenology, mechanisms, and relations to jamming
- Shear thickening of cornstarch suspensions as a re-entrant jamming transition
- High-speed ultrasound imaging in dense suspensions reveals impact-activated solidification due to dynamic shear jamming
- Coefficient of restitution for wet particles
- Dilatancy in the flow and fracture of stretched colloidal suspensions
- Tunable Shear Thickening in Suspensions
- Persistent holes in a fluid
- Quasi-2D dynamic jamming in cornstarch suspensions: visualization and force measurements
- Unifying impacts in granular matter from quicksand to cornstarch
- System-spanning dynamically jammed region in response to impact of cornstarch and water suspensions
- Constitutive relation for the system-spanning dynamically jammed region in response to impact of cornstarch and water suspensions
- Testing constitutive relations by running and walking on cornstarch and water suspensions
- The Physics of Protoplanetesimal Dust Agglomerates. X. Mechanical properties of dust aggregates probed by a solid-projectile impact
- Sinking during earthquakes: Critical acceleration criteria control drained soil liquefaction
- Negative pressure in shear thickening band of a dilatant fluid
- Impact-induced energy transfer and dissipation in granular clusters under microgravity conditions