Journal ArticleDOI
Oceanic thermohaline intrusions: theory
Barry Ruddick,Oliver S. Kerr +1 more
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TLDR
A review of theories governing growth and evolution of thermohaline intrusive motions is given in this paper, where the authors discuss linear theories of various physical configurations, effects of rotation and shear, and nonlinear theories.About:
This article is published in Progress in Oceanography.The article was published on 2003-03-01. It has received 59 citations till now.read more
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Numerical Simulations of Thermohaline Convection: Implications for Extra-mixing in Low-mass RGB Stars
TL;DR: In this paper, two-dimensional numerical simulations of thermohaline convection for physical conditions corresponding to the RGB case have been carried out to determine if the salt-fingering transport of chemical composition driven by 3He burning is efficient enough to produce RGB extra-mixing.
Journal ArticleDOI
A review of oceanic salt-fingering theory
TL;DR: A review of salt-fingering theory as they pertain to ocean mixing can be found in this article, where basic equations are presented along with steady, maximum buoyancy-flux and fastest growing finger solutions.
Journal ArticleDOI
Dynamics of fingering convection I: Small-scale fluxes and large-scale instabilities
TL;DR: In this paper, the authors present an exhaustive study of the fingering convection phenomenon from small to large scales and perform the first 3D simulations of the process at realistic values of the heat and salt diffusivities and provide accurate estimates of the induced turbulent transport.
Journal ArticleDOI
Numerical Simulations of Thermohaline Convection: Implications for Extra-Mixing in Low-Mass RGB Stars
Abstract: Low-mass stars are known to experience extra-mixing in their radiative zones on the red-giant branch (RGB) above the bump luminosity. To determine if the salt-fingering transport of chemical composition driven by 3He burning is efficient enough to produce RGB extra-mixing, 2D numerical simulations of thermohaline convection for physical conditions corresponding to the RGB case have been carried out. We have found that the effective ratio of a salt-finger's length to its diameter a_eff 7). On the other hand, using the thermohaline diffusion coefficient from linear stability analysis together with a=a_obs is able to describe the RGB extra-mixing at all metallicities so well that it is tempting to believe that it may represent the true mechanism. In view of these results, follow-up 3D numerical simulations of thermohaline convection for the RGB case are clearly needed.
Journal ArticleDOI
The Gaia-ESO Survey: CNO abundances in the open clusters Trumpler 20, NGC 4815, and NGC 6705
Gražina Tautvaišienė,Arnas Drazdauskas,Šarūnas Mikolaitis,G. Barisevičius,E. Puzeras,E. Stonkutė,Y. Chorniy,Laura Magrini,Donatella Romano,Rodolfo Smiljanic,Angela Bragaglia,Giovanni Carraro,Eileen D. Friel,Thierry Morel,Elena Pancino,P. Donati,F. M. Jiménez-Esteban,Gerard Gilmore,Sofia Randich,R. D. Jeffries,Antonella Vallenari,Thomas Bensby,Ettore Flaccomio,Alejandra Recio-Blanco,M. T. Costado,Vanessa Hill,Paula Jofre,Carmela Lardo,P. de Laverny,Thomas Masseron,L. Moribelli,S. G. Sousa,Simone Zaggia +32 more
TL;DR: In this article, high-resolution spectra, observed with the FLAMES-UVES spectrograph on the ESO VLT telescope, were analyzed using a differential model atmosphere method.
References
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Buoyancy Effects in Fluids
TL;DR: In this article, the authors introduce linear internal waves and herar flows in a stratified fluid and double-diffusive convection in stably stratified fluids, and show that the shear flows can produce turbulence.
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Double-diffusive convection
TL;DR: In this paper, the authors present a rather personal view of the important developments in double-diffusive convection, a subject whose evolution has been the result of a close interaction between theoreticians, laboratory experimenters and sea-going oceano-graphers.
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Double diffusion in oceanography
TL;DR: Turner et al. as mentioned in this paper showed how opposing stratifications of two component species could drive convection if their diffusivities differed, and they also identified the potential for the oscillatory instability when cold, fresh water overlies warm, salty water.
Journal ArticleDOI
Two Years in the Life of a Mediterranean Salt Lens
Laurence Armi,Dave Hebert,Neil S. Oakey,James F. Price,Philip L. Richardson,H. Thomas Rossby,Barry Ruddick +6 more
TL;DR: A lens of Mediterranean water (Meddy) was tracked in the eastern North Atlantic for two years with SOFAR floats as mentioned in this paper, moving in an irregular pattern, at speeds of a few cm s−1, and translated 1100 km to the south in two years.