Analysis and modeling of subgrid scalar mixing using numerical data


Direct numerical simulations (DNS) of passive scalar mixing in isotropic turbulence is used to study, analyze and, subsequently, model the role of small (subgrid) scales in the mixing process. In particular, we attempt to model the dissipation of the large scale (supergrid) scalar uctuations caused by the subgrid scales by decomposing it into two parts: (i… (More)