Abstract
Materials comprised of deformable particles such as microgels and concentrated emulsions and foams display complex rheological behavior that includes a yielding transition from an elastic solid to viscous fluid. Most studies of this class of soft matter involve shear flows, and only a handful report both shear and normal stresses. We present measurements of the shear stress and two normal stress differences for a microgel subjected to constant shear rate flows. The shear stress evolves through the yield point in a manner indicative of simple yield stress fluid behavior. Prior to yielding, the normal stress differences are immeasurable; beyond the yield point, they evolve in a reproducibly chaotic manner.
| Original language | American English |
|---|---|
| Article number | 068002 |
| Journal | Physical review letters |
| Volume | 129 |
| Issue number | 6 |
| DOIs | |
| State | Published - Aug 5 2022 |
ASJC Scopus subject areas
- General Physics and Astronomy
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