213 citations · 557 across the 12 of their papers we have counts for
13 papers
Spatio-temporal Signatures of Elasto-inertial Turbulence in Viscoelastic Planar Jets
Sami Yamani, Yashasvi Raj, Tamer A. Zaki +2
The interplay between viscoelasticity and inertia in dilute polymer solutions at high deformation rates can result in inertio-elastic instabilities. The nonlinear evolution of thes…
Yield precursor in primary creep of colloidal gels
Jae Hyung Cho, Irmgard Bischofberger
Predicting the time-dependent yielding of colloidal gels under constant stress enables control of their mechanical stability and transport. Using rotational rheometry, we show that…
Lasting effects of discontinuous shear thickening in cornstarch suspensions upon flow cessation
Jae Hyung Cho, Andrew H. Griese, Ivo R. Peters +1
Dense suspensions that exhibit discontinuous shear thickening (DST) undergo complex stress relaxation when the flow abruptly stops. Using rotational rheometry, we study the two-ste…
Perspectives on viscoelastic flow instabilities and elastic turbulence
Sujit S. Datta, Arezoo M. Ardekani, Paulo E. Arratia +20
Viscoelastic fluids are a common subclass of rheologically complex materials that are encountered in diverse fields from biology to polymer processing. Often the flows of viscoelas…
Single-shot quantitative polarization imaging of complex birefringent structure dynamics
Baoliang Ge, Qing Zhang, Rui Zhang +8
Polarization light microscopes are powerful tools for probing molecular order and orientation in birefringent materials. While a multitude of polarization light microscopy techniqu…
Two Modes of Cluster Dynamics Govern the Viscoelasticity of Colloidal Gels
Jae Hyung Cho, Irmgard Bischofberger
Colloidal gels formed by strongly attractive particles at low particle volume fractions are composed of space-spanning networks of uniformly sized clusters. We study the thermal fl…
Growth morphology and symmetry selection of interfacial instabilities in anisotropic environments
Qing Zhang, Amin Amooie, Martin Z. Bazant +1
The displacement of a fluid by another less viscous one in a quasi-two dimensional geometry typically leads to complex fingering patterns. In an isotropic system, dense-branching g…
Criterion for fingering instabilities in colloidal gels
Thibaut Divoux, Asheesh Shukla, Badis Marsit +2
We sandwich a colloidal gel between two parallel plates and induce a radial flow by lifting the upper plate at a constant velocity. Two distinct scenarios result from such a tensil…
Emergence of Multiscale Dynamics in Colloidal Gels
Jae Hyung Cho, Roberto Cerbino, Irmgard Bischofberger
To gain insight into the kinetics of colloidal gel evolution at low particle volume fractions , we utilize differential dynamic microscopy to investigate particle aggregation, g…
Designing allostery-inspired response in mechanical networks
Jason W. Rocks, Nidhi Pashine, Irmgard Bischofberger +3
Recent advances in designing meta-materials have demonstrated that global mechanical properties of disordered spring networks can be tuned by selectively modifying only a small sub…
Fingering versus stability in the limit of zero interfacial tension
Irmgard Bischofberger, Radha Ramachandran, Sidney R. Nagel
The invasion of one fluid into another of higher viscosity in a quasi-two dimensional geometry typically produces complex fingering patterns. Because interfacial tension suppresses…
An island of stability in a sea of fingers: emergent large-scale features of the viscous flow instability
Irmgard Bischofberger, Radha Ramachandran, Sidney R. Nagel
The displacement of a more viscous fluid by a less viscous one in a quasi-two dimensional geometry leads to the formation of complex fingering patterns. This fingering has been cha…
Multiple dynamic regimes in concentrated microgel systems
David A. Sessoms, Irmgard Bischofberger, Luca Cipelletti +1
We investigate dynamical heterogeneities in the collective relaxation of a concentrated microgel system, for which the packing fraction can be conveniently varied by changing the t…