Abstract
We present direct numerical simulation of heavy inertial particles (dust) immersed in two-dimensional turbulent flow (gas). The dust particles are modeled as monodispersed heavy particles capable of modifying the flow through two-way coupling. By varying the Stokes number () and the mass-loading parameter (), we study the clustering phenomenon and the gas phase kinetic energy spectra. We find that the dust-dust correlation dimension () also depends on . In particular, clustering decreases as mass loading () is increased. In the kinetic energy spectra of gas we show (i) the emergence of a different scaling regime and that (ii) the scaling exponent in this regime is not universal but a function of both and . Using a scale-by-scale enstrophy budget analysis we show that in this emerged scaling regime, which we call the dust-dissipative range, viscous dissipation due to the gas balances the back-reaction from the dust.
- Received 18 February 2019
DOI:https://doi.org/10.1103/PhysRevE.100.013114
©2019 American Physical Society