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Localised thermal convection in rotating spheres that undergo weak precession
Lam, Kameng1,2; Kong, Dali2,3; Zhang, Keke1,3
2020-07-21
Source PublicationGEOPHYSICAL AND ASTROPHYSICAL FLUID DYNAMICS
ISSN0309-1929
Pages17
AbstractWe report a new nonlinear phenomenon discovered in the classical problem of thermal convection in a rapidly rotating, self-gravitating, internally heated fluid sphere that also undergoes weak precession. When the Prandtl number of fluids is sufficiently large, convection-driven columnar rolls - which are nearly geostrophic and marked by small azimuthal scale - cannot have substantial nonlinear interaction with precession-driven flow that is in the form of an equatorially antisymmetric, large-scale inertial wave in the mantle frame of reference. When the Prandtl number of fluids is sufficiently small, convection-driven flow, because of predominant inertial effects in its dynamics, is non-geostrophic and in the form of an equatorially symmetric, large-scale inertial wave, and, hence, is able to interact destructively with the precession-driven large-scale inertial wave via nonlinear effects. We reveal that the destructive interaction between the convection-driven wave and the precession-driven wave leads to a localised convective wave that is nearly equatorially symmetric, progradely travelling in the azimuthal direction, and largely confined within a quarter of the sphere.
KeywordThermal convection precession inertial waves rotating spheres
Funding OrganizationScience and Technology Development Fund, Macau SAR ; Science and Technology Development Fund, Macau SAR ; pre-research project on Civil Aerospace Technologies - China National Space Administration ; pre-research project on Civil Aerospace Technologies - China National Space Administration ; Science and Technology Development Fund, Macau SAR ; Science and Technology Development Fund, Macau SAR ; pre-research project on Civil Aerospace Technologies - China National Space Administration ; pre-research project on Civil Aerospace Technologies - China National Space Administration ; Science and Technology Development Fund, Macau SAR ; Science and Technology Development Fund, Macau SAR ; pre-research project on Civil Aerospace Technologies - China National Space Administration ; pre-research project on Civil Aerospace Technologies - China National Space Administration ; Science and Technology Development Fund, Macau SAR ; Science and Technology Development Fund, Macau SAR ; pre-research project on Civil Aerospace Technologies - China National Space Administration ; pre-research project on Civil Aerospace Technologies - China National Space Administration
DOI10.1080/03091929.2020.1791844
WOS KeywordPOINCARE EQUATION ; INERTIAL WAVES ; LIQUID ; ONSET ; FLOWS
Language英语
Funding ProjectScience and Technology Development Fund, Macau SAR[0001/2019/A1] ; pre-research project on Civil Aerospace Technologies - China National Space Administration[D020308] ; pre-research project on Civil Aerospace Technologies - China National Space Administration[D020303]
Funding OrganizationScience and Technology Development Fund, Macau SAR ; Science and Technology Development Fund, Macau SAR ; pre-research project on Civil Aerospace Technologies - China National Space Administration ; pre-research project on Civil Aerospace Technologies - China National Space Administration ; Science and Technology Development Fund, Macau SAR ; Science and Technology Development Fund, Macau SAR ; pre-research project on Civil Aerospace Technologies - China National Space Administration ; pre-research project on Civil Aerospace Technologies - China National Space Administration ; Science and Technology Development Fund, Macau SAR ; Science and Technology Development Fund, Macau SAR ; pre-research project on Civil Aerospace Technologies - China National Space Administration ; pre-research project on Civil Aerospace Technologies - China National Space Administration ; Science and Technology Development Fund, Macau SAR ; Science and Technology Development Fund, Macau SAR ; pre-research project on Civil Aerospace Technologies - China National Space Administration ; pre-research project on Civil Aerospace Technologies - China National Space Administration
WOS Research AreaAstronomy & Astrophysics ; Geochemistry & Geophysics ; Mechanics
WOS SubjectAstronomy & Astrophysics ; Geochemistry & Geophysics ; Mechanics
WOS IDWOS:000552532900001
PublisherTAYLOR & FRANCIS LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/82619
Collection中国科学院国家天文台
Corresponding AuthorZhang, Keke
Affiliation1.Macau Univ Sci & Technol, State Key Lab Lunar & Planetary Sci, Macau, Macao, Peoples R China
2.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Planetary Sci, Shanghai, Peoples R China
3.Univ Exeter, Ctr Geophys & Astrophys Fluid Dynam, Exeter, Devon, England
Recommended Citation
GB/T 7714
Lam, Kameng,Kong, Dali,Zhang, Keke. Localised thermal convection in rotating spheres that undergo weak precession[J]. GEOPHYSICAL AND ASTROPHYSICAL FLUID DYNAMICS,2020:17.
APA Lam, Kameng,Kong, Dali,&Zhang, Keke.(2020).Localised thermal convection in rotating spheres that undergo weak precession.GEOPHYSICAL AND ASTROPHYSICAL FLUID DYNAMICS,17.
MLA Lam, Kameng,et al."Localised thermal convection in rotating spheres that undergo weak precession".GEOPHYSICAL AND ASTROPHYSICAL FLUID DYNAMICS (2020):17.
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