Stretching and buckling of small elastic fibers in turbulence
arXiv:1805.05731 · doi:10.1103/PhysRevLett.121.154501
Abstract
Small flexible fibers in a turbulent flow are found to be most of the time as straight as stiff rods. This is due to the cooperative action of flexural rigidity and fluid stretching. However, fibers might bend and buckle when they tumble and experience a strong-enough local compressive shear. Such events are similar to an activation process, where the role of temperature is played by the inverse of Young's modulus. Numerical simulations show that buckling occurs very intermittently in time. This results from unexpected long-range Lagrangian correlations of the turbulent shear.
References in corpus (6)
- Alignment of vorticity and rods with Lagrangian fluid stretching in turbulence
- Morphological transitions of elastic filaments in shear flow
- Flexible fiber reveals the two-point statistical properties of turbulence
- Two-dimensional turbulence of dilute polymer solutions
- Impact of the floating-point precision and interpolation scheme on the results of DNS of turbulence by pseudo-spectral codes
- Tumbling of a Brownian particle in an extensional flow
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- Elasto-inertial Chains in a Two-dimensional Turbulent Flow
- Spontaneous knotting of a flexible fiber in chaotic flows
- Pattern stabilisation in swarms of programmable active matter: a probe for turbulence at large length scales
- Using deformable particles for single particle measurements of velocity gradient tensors
- Dynamics and fragmentation of small inextensible fibers in turbulence