Dynamic shear jamming in dense granular suspensions under extension

Abstract

Unlike dry granular materials, a dense granular suspension like cornstarch in water can strongly resist extensional flows. At low extension rates, such a suspension behaves like a viscous liquid, but rapid extension results in a response where stresses far exceed the predictions of lubrication hydrodynamics and capillarity. To understand this remarkable mechanical response, we experimentally measure the normal force imparted by a large bulk of the suspension on a plate moving vertically upward at a controlled velocity. We observe that above a velocity threshold, the peak force increases by orders of magnitude. Using fast ultrasound imaging we map out the local velocity profiles inside the suspension which reveal the formation of a growing jammed region under rapid extension. This region interacts with the rigid boundaries of the container through strong velocity gradients, suggesting a direct connection to the recently proposed shear-jamming mechanism.

Accepted for publication in Phys. Rev. E

References in corpus (5)

• 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
• Macroscopic Discontinuous Shear Thickening vs Local Shear Jamming in Cornstarch
• Dilatancy in the flow and fracture of stretched colloidal suspensions
• Quasi-2D dynamic jamming in cornstarch suspensions: visualization and force measurements

Cited by in corpus (11)

• Interparticle hydrogen bonding can elicit shear jamming in dense suspensions
• Rheology of dense granular suspensions under extensional flow
• Shear jammed, fragile, and steady states in homogeneously strained granular materials
• Constitutive relations for shear fronts in shear-thickening suspensions
• Stress controlled rheology of dense suspensions using transient flows
• Signature of jamming under steady shear in dense particulate suspensions
• Getting jammed in all directions: Dynamic shear jamming around a cylinder towed through a dense suspension
• Origin of two distinct stress relaxation regimes in shear jammed dense suspensions
• Rheology of granular liquids in extensional flows: Beyond the $\mu (\mathcal{I})$-law
• Characterizing the surface texture of a dense suspension undergoing dynamic jamming
• Collision of Dynamic Jamming Fronts in a Dense Suspension