A numerical model of convective heat transfer in Titan's subsurface ocean
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F22%3A10447987" target="_blank" >RIV/00216208:11320/22:10447987 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=jdu5oXouBJ" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=jdu5oXouBJ</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.icarus.2021.114853" target="_blank" >10.1016/j.icarus.2021.114853</a>
Alternative languages
Result language
angličtina
Original language name
A numerical model of convective heat transfer in Titan's subsurface ocean
Original language description
It has been suggested that the long-wavelength topography of Titan is related to lateral variations in the heat flux from the ocean. Recent studies of the heat transfer in Titan's ocean agree that the time-averaged heat flux can vary in latitude by tens of percent, but they predict different distributions of heat flux anomalies at the upper boundary of the ocean. In order to clarify this issue, we perform 115 numerical simulations of thermal convection in a rotating spherical shell, varying the mechanical boundary conditions and dimensionless input parameters (Rayleigh, Ekman and Prandtl numbers) by at least one order of magnitude. The results of the simulations are examined in terms of the modified transitional number, R-G* = RaEk12/7Pr-1. Depending on the relative importance of rotation, the heat flux maximum is located either at the equator (equatorial cooling) or at the poles (polar cooling). We demonstrate that equatorial cooling occurs when R-G*< 1 or R-G* > 10 while polar cooling occurs when R-G* is an element of < 1, 10 >. Based on this result, we predict that Titan's ocean is in the polar cooling mode and the heat flux distribution is controlled by zonal degree 2 and 4 harmonics. The predicted heat flux shows a high degree of similarity with the axisymmetric part of Titan's long-wavelength topography, indicating a strong relationship between ocean dynamics and the processes in the ice shell.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10500 - Earth and related environmental sciences
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Icarus
ISSN
0019-1035
e-ISSN
1090-2643
Volume of the periodical
376
Issue of the periodical within the volume
April
Country of publishing house
US - UNITED STATES
Number of pages
15
Pages from-to
114853
UT code for WoS article
000793268700008
EID of the result in the Scopus database
2-s2.0-85122625021