Microstructure and thickening of dense suspensions under extensional and shear flows
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2017.469
Abstract: Dense suspensions are non-Newtonian fluids that exhibit strong shear thickening and normal stress differences. Using numerical simulation of extensional and shear flows, we investigate how rheological properties are determined by the microstructure that is built… read more here.
Keywords: thickening dense; suspensions extensional; dense suspensions; microstructure thickening ... See more keywords
Normal stress differences in dense suspensions
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2018.743
Abstract: The presence and the microscopic origin of normal stress differences in dense suspensions under simple shear flows are investigated by means of inertialess particle dynamics simulations, taking into account hydrodynamic lubrication and frictional contact forces.… read more here.
Keywords: dense suspensions; stress differences; stress; differences dense ... See more keywords
Capturing both carrier and disperse phases in dense suspensions using harmonic ultrasound imaging velocimetry
Sign Up to like & getrecommendations! Published in 2021 at "Measurement Science and Technology"
DOI: 10.1088/1361-6501/abf679
Abstract: In this study, a new ultrasound-based method for measuring both carrier-fluid and suspended-particle (disperse phase) motion is introduced. The method can extract flow quantities, such as slip velocity, from statistical information obtained in dense two-phase… read more here.
Keywords: disperse phase; dense suspensions; carrier; disperse ... See more keywords
Stress Controlled Rheology of Dense Suspensions Using Transient Flows.
Sign Up to like & getrecommendations! Published in 2019 at "Physical review letters"
DOI: 10.1103/physrevlett.123.248002
Abstract: Dense suspensions of hard particles in a Newtonian liquid can be jammed by shear when the applied stress exceeds a certain threshold. However, this jamming transition from a fluid into a solidified state cannot be… read more here.
Keywords: transient flows; stress; state; rheology ... See more keywords
Modeling the Microstructure and Stress in Dense Suspensions under Inhomogeneous Flow.
Sign Up to like & getrecommendations! Published in 2020 at "Physical review letters"
DOI: 10.1103/physrevlett.125.184503
Abstract: Under inhomogeneous flow, dense suspensions exhibit behavior that violates the conventional homogeneous rheology. Specifically, one finds flowing regions with a macroscopic friction coefficient below the yielding criterion, and volume fraction above the jamming criterion. We… read more here.
Keywords: microstructure stress; inhomogeneous flow; dense suspensions;
Shear viscosity and wall slip behavior of dense suspensions of polydisperse particles
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Rheology"
DOI: 10.1122/1.5053702
Abstract: The significant problem of wall slip and shear viscosity of dense suspensions is addressed using steady torsional and capillary flows of a silicone polymer, incorporated with polydisperse particles with low aspect ratios, to achieve a… read more here.
Keywords: viscosity; slip; dense suspensions; shear viscosity ... See more keywords