Evidences of Bolgiano-Obhukhov scaling in three-dimensional Rayleigh-Bénard convection.
We present different results from high-resolution high-statistics direct numerical simulations of a three-dimensional convective cell. We test the fundamental physical picture of the presence of both a Bolgiano-Obhukhov-like and a Kolmogorov-like regime. We find that the dimensional predictions for these two distinct regimes (characterized, respectively, by an active and passive role of the temperature field) are consistent with our analysis.
Calzavarini
Enrico
E
Università degli Studi di Ferrara and INFN, Sezione di Ferrara, I-34100, Ferrara, Italy.
Toschi
Federico
F
Tripiccione
Raffaele
R