Journal
PHYSICAL REVIEW LETTERS
Volume 99, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.99.058303
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It is shown that a slender elastic fiber moving in a Stokesian fluid can be susceptible to a buckling instability-termed the stretch-coil instability-when moving in the neighborhood of a hyperbolic stagnation point of the flow. When the stagnation point is part of an extended cellular flow, it is found that immersed fibers can move as random walkers across time-independent closed-streamline flow. It is also found that the flow is segregated into transport regions around hyperbolic stagnation points and their manifolds, and closed entrapment regions around elliptic points.
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