Turbulent convection within rapidly rotating superadiabatic fluids with horizontal temperature gradients
作者:
F.Michael Flasar,
PeterJ. Gierasch,
期刊:
Geophysical & Astrophysical Fluid Dynamics
(Taylor Available online 1978)
卷期:
Volume 10,
issue 1
页码: 175-212
ISSN:0309-1929
年代: 1978
DOI:10.1080/03091927808242636
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
A model is developed for small scale thermally driven turbulent convection in rapidly rotating systems. The Boussinesq equations of adiabatic and inviscid flow are perturbed about a basic state which is superadiabatic and which contains a horizontal temperature gradient balanced by a geostrophic wind. The growth rates and length scales of the most unstable modes are determined. It is found that these modes are either zonally or latitudinally symmetric, depending on the latitude and the horizontal temperature gradient. The transports of heat and momentum by the modes are computed. The linear amplitudes are assumed to be limited by shear instability. The model predicts a latitude dependent eddy diffusivity. The applicability of the model to astrophysical and planetary bodies is briefly discussed.
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