The effect of particle anisotropy on the modulation of turbulent flows
arXiv:2209.14497 · doi:10.1017/jfm.2022.832
Abstract
We investigate the modulation of turbulence caused by the presence of finite-size dispersed particles. Bluff (isotropic) spheres vs slender (anisotropic) fibers are considered to understand the influence of the object shape on altering the carrier flow. While at a fixed mass fraction - but different Stokes number - both objects provide a similar bulk effect characterized by a large-scale energy depletion, a scale-by-scale analysis of the energy transfer reveals that the alteration of the whole spectrum is intrinsically different. For bluff objects, the classical energy cascade is shrinked in its extension but unaltered in the energy content and its typical features, while for slender ones we find an alternative energy flux which is essentially mediated by the fluid-solid coupling.
11 pages, 6 figures
References in corpus (4)
- Dispersed fibers change the classical energy budget of turbulence via nonlocal transfer
- The effect of droplet coalescence on drag in turbulent channel flows
- How do the finite-size particles modify the drag in Taylor-Couette turbulent flow
- Universal flapping states of elastic fibers in modulated turbulence