Fluctuating Hydrodynamics of Granular Gases Driven by Thermal Walls

At non-equilibrium, molecular gases exhibit large-scale fluctuations and long-ranged hydrodynamical correlations. Enhancement of these fluctuations and correlations have a significant effect on their transport and overall macroscopic behavior. However, in contrast to molecular gases, particle collisions in granular gases are inelastic. In this talk, I will describe the effect of such inelastic particle collisions on hydrodynamical fluctuations in driven granular gases, which are crucial in industry (fluidized beds and aerosols) and nature (aeolian transport and erosion). Using the direct simulation Monte Carlo method, non-equilibrium steady states of granular gases are established through thermal driving from isothermal walls. By systematically varying the magnitude of collision inelasticity, we study the spatial structure of hydrodynamical fluctuations in density-homogeneous and clustering granular gases.