Accepted Talks Proceedings »
PDF
0.4MB
In the context of flows laden with inertial particles, we explore a novel regime, in which turbulence is sustained solely by the thermal radiation absorbed by the dispersed phase. When a fluid laden with particles is subject to radiative flux, non-uniformities in particle distribution result in local temperature fluctuations. Under the influence of gravity, buoyancy induces the vortical fluid motion leading to higher non-uniformities of inertial particles. From numerical simulations it is shown that the feedback loop between the local particle concentration, the temperature fluctuations and the convective motion can create and sustain turbulence. When the particle response time is comparable to the temporal scales of the flow, the system exhibits intense fluctuations of turbulent kinetic energy associated to the high intermittency of the particle concentration.
Author(s):
Rémi Zamansky
Center for Turbulence Reseach, Stanford University
United States
Filippo Coletti
Mechanical Engineering, Stanford University
United States
Marc Massot
Ecole Centrale Paris, EM2C - UPR CNRS 288
France
Ali Mani
Center for Turbulence Reseach, Stanford University
United States