On validation of turbulent mixing simulations for Rayleigh–Taylor instability

Hyunsun Lee, Hyeonseong Jin, Yan Yu, James Glimm
2008 Physics of Fluids  
We study directly the appropriate settings for a subgrid diffusion coefficient, to be inserted into simulations modeling miscible experiments. This is our most definitive assessment of the role for a subgrid model. We find that a Smagorinsky type subgrid mass diffusion model would have a diffusion coefficient at most about 0.15% of the value of the physical mass diffusion for the (mass diffusive) experiment studied.
doi:10.1063/1.2832775 fatcat:hrntljefavgs3b6e4hach5x4pa