Dispersed fibers change the classical energy budget of turbulence via nonlocal transfer
arXiv:2007.03958 · doi:10.1103/PhysRevLett.125.114501
Abstract
The back-reaction of dispersed rigid fibers to turbulence is analyzed by means of a state-of-the-art fully-coupled immersed boundary method. The following universal scenario is identified: turbulence at large scales looses a consistent part of its kinetic energy (via a Darcy friction term), which partially re-appears at small scales where a new range of energy-containing scales does emerge. Large-scale mixing is thus depleted in favor of a new mixing mechanism arising at the smallest scales. Anchored fibers cause the same back-reaction to turbulence as moving fibers of large inertia. Our results thus provide a link between two apparently separated realms: the one of porous media and the one of suspension dynamics.
References in corpus (2)
Cited by in corpus (16)
- Modulation of homogeneous and isotropic turbulence in emulsions
- Turbulence dictates the fate of virus-containing droplets in violent expiratory events
- Unraveling the secrets of turbulence in a fluid puff
- On the fully coupled dynamics of flexible fibres dispersed in modulated turbulence
- Dynamics and fluid-structure interaction in turbulent flows within and above flexible canopies
- Morphology of clean and surfactant-laden droplets in homogeneous isotropic turbulence
- The effect of particle anisotropy on the modulation of turbulent flows
- Strong alignment of prolate ellipsoids in Taylor-Couette flow
- Forced and natural dynamics of a clamped flexible fiber in wall turbulence
- Universal flapping states of elastic fibers in modulated turbulence
- Reconfiguration and dynamics of clamped fibers under finite-amplitude surface gravity waves
- Edge-effects in the turbulent flow over flexible aquatic vegetation
- Fiber Tracking Velocimetry for two-point statistics of turbulence
- Fluid dynamics of COVID-19 airborne infection suggests urgent data for a scientific design of social distancing
- Effect of submerged vegetation on water surface geometry and air-water momentum transfer
- Puff turbulence in the limit of strong buoyancy