@article{ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuMTAxNy9zMDAyMjExMjAwMjAwMTM1MA,
journal = {Journal of Fluid Mechanics},
title = {Turbulent thermal convection in a rotating stratified fluid},
volume = {467},
author = {M. A. LEVY and H. J. S. FERNANDO},
publisher = {Cambridge University Press (CUP)},
year = {2002},
issn = {0022-1120},
issn = {1469-7645},
pages = {19 - 40},
language = {English},
abstract = {Turbulent convection induced by heating the bottom boundary of a horizontally
homogeneous, linearly (temperature) stratified, rotating fluid layer is studied using
a series of laboratory experiments. It is shown that the growth of the convective
mixed layer is dynamically affected by background rotation (or Coriolis forces) when the parameter
R = (h2Ω3/q0)2/3
exceeds a critical value of Rc ≈ 275. Here h is the
depth of the convective layer, Ω is the rate of rotation, and q0 is the
buoyancy flux at the bottom boundary. At larger R, the buoyancy gradient in the mixed layer
appears to scale as (db/dz)ml = CΩ2, where
C ≈ 0.02. Conversely, when R < Rc, the
buoyancy gradient is independent of Ω and approaches that of the non-rotating case. The
entrainment velocity, ue, for R > Rc was
found to be dependent on Ω according to E
= [Ri(1 + CΩ2/N2)]−1,
where E is the entrainment coefficient based on the convective velocity
w∗ = (q0h)1/3,
E = ue/w∗, Ri is the Richardson number
Ri = N2h2/w2∗, and N
is the buoyancy frequency of the overlying stratified layer.
The results indicate that entrainment in this case is dominated by non-penetrative
convection, although the convective plumes can penetrate the interface in the form
of lenticular protrusions.},
url = {http://dx.doi.org/10.1017/s0022112002001350},
url = {https://katalog.bibliothek.tu-chemnitz.de/Record/ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuMTAxNy9zMDAyMjExMjAwMjAwMTM1MA}
}