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Collective stiffening of soft hair assemblies
- Source :
- Physical Review E, Physical Review E, American Physical Society (APS), 2020, 102 (1), pp.010602. ⟨10.1103/PhysRevE.102.010602⟩, Physical Review E, American Physical Society (APS), 2020, 102 (1), ⟨10.1103/PhysRevE.102.010602⟩
- Publication Year :
- 2020
- Publisher :
- American Physical Society (APS), 2020.
-
Abstract
- Many living systems use assemblies of soft and slender structures whose deflections allow them to mechanically probe their immediate environment. In this work, we study the collective response of artificial soft hair assemblies to a shear flow by imaging their deflections. At all hair densities, the deflection is found to be proportional to the local shear stress with a proportionality factor that decreases with density. The measured collective stiffening of hairs is modeled both with a microscopic elastohydrodynamic model that takes into account long range hydrodynamic hair-hair interactions and a phenomenological model that treats the hair assemblies as an effective porous medium. While the microscopic model is in reasonable agreement with the experiments at low hair density, the phenomenological model is found to be predictive across the entire density range.<br />Comment: 5 pages, 3 figures
- Subjects :
- Materials science
[PHYS.PHYS.PHYS-BIO-PH]Physics [physics]/Physics [physics]/Biological Physics [physics.bio-ph]
Mechanical Phenomena
FOS: Physical sciences
Condensed Matter - Soft Condensed Matter
01 natural sciences
010305 fluids & plasmas
Biological Physics
[MATH.MATH-MP]Mathematics [math]/Mathematical Physics [math-ph]
Deflection (engineering)
0103 physical sciences
Phenomenological model
otorhinolaryngologic diseases
Shear stress
010306 general physics
Porosity
ComputingMilieux_MISCELLANEOUS
integumentary system
Polymers & Soft Matter
Fluid Dynamics
Mechanics
Biomechanical Phenomena
Stiffening
Soft Condensed Matter (cond-mat.soft)
sense organs
Shear Strength
Porous medium
Shear flow
[PHYS.COND.CM-SCM]Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft]
Hair
Subjects
Details
- ISSN :
- 24700053 and 24700045
- Volume :
- 102
- Database :
- OpenAIRE
- Journal :
- Physical Review E
- Accession number :
- edsair.doi.dedup.....88d1fc345352397e1f5784fd8c990e2b