期刊
PHYSICAL REVIEW E
卷 81, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevE.81.051908
关键词
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资金
- NSF through the Harvard MRSEC [DMR-075105, DMR-0806511]
- Brandeis MRSEC
- Harvard Kavli Institute for Nanobio Science and Technology
- EPSRC-GB [EP/G026440/1]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0820484] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [GRANTS:13883333, 0806511] Funding Source: National Science Foundation
- Engineering and Physical Sciences Research Council [EP/G026440/1] Funding Source: researchfish
- EPSRC [EP/G026440/1] Funding Source: UKRI
We analyze the behavior of a suspension of active polar particles under shear. In the absence of external forces, orientationally ordered active particles are known to exhibit a transition to a state of nonuniform polarization and spontaneous flow. Such a transition results from the interplay between elastic stresses, due to the liquid crystallinity of the suspension, and internal active stresses. In the presence of an external shear, we find an extremely rich variety of phenomena, including an effective reduction (increase) in the apparent viscosity depending on the nature of the active stresses and the flow-alignment property of the particles, as well as more exotic behaviors such as a nonmonotonic stress-strain-rate relation and yield stress for large activities.
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