RT Journal Article
T1 The effect of particle anisotropy on the modulation of turbulent flows
A1 Olivieri, Stefano
A1 Cannon, Ianto
A1 Rosti, Marco E.
AB We investigate the modulation of turbulence caused by the presence of finite-size dispersed particles. Bluff (isotropic) spheres versus slender (anisotropic) fibres are considered to understand the influence of the shape of the objects 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 shrinks in its extension but is 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.
PB Cambridge University Press
SN 0022-1120
YR 2022
FD 2022-11-10
LK https://hdl.handle.net/10016/37347
UL https://hdl.handle.net/10016/37347
LA eng
NO The research was supported by the Okinawa Institute of Science and Technology Graduate University (OIST) with subsidy funding from the Cabinet Office, Government of Japan.
DS e-Archivo
RD 1 sept. 2024