Abstract
All numerical simulations of stellar convection assume that the unresolved subgrid scales (SGSs) are only dissipative. We show that the assumption is incorrect and that the SGSs stir (advection), mix (diffusion), and dissipate. The first two processes were never considered before. We also show that there are two advective velocities: one contributed by the resolved scales and the other, a bolus velocity, by the unresolved scales.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have