Irreversibility and rate dependence in sheared adhesive suspensions
Zhouyang Ge, Raffaella Martone, Luca Brandt, Mario Minale
Abstract
Experiments and simulations of a non-Brownian suspension of particles demonstrate that weak van der Waals (adhesive) interactions induce rate dependence of the rheological response in oscillatory shear flow, with enhanced particle diffusivities and cluster formations below a critical shear rate, even though the steady shear behavior remains rate-independent. Phase diagrams showing the influence of volume fraction, strain amplitude, and oscillation frequency, for a given Hamaker constant, highlight the connection between irreversibility and suspension rheology.
Topics & Concepts
Rheologyvan der Waals forceHamaker constantShear rateSuspension (topology)Shear flowAdhesiveBrownian motionShear (geology)AmplitudeMaterials scienceThermodynamicsVolume fractionMechanicsChemistryPhysicsComposite materialVan der Waals radiusMathematicsQuantum mechanicsPure mathematicsHomotopyMoleculeOrganic chemistryLayer (electronics)Material Dynamics and PropertiesGranular flow and fluidized bedsRheology and Fluid Dynamics Studies