KMS National Astronomical Observatories, CAS
| Localised thermal convection in rotating spheres that undergo weak precession | |
| Lam, Kameng1,2; Kong, Dali2,3; Zhang, Keke1,3 | |
| 2020-07-21 | |
| Source Publication | GEOPHYSICAL AND ASTROPHYSICAL FLUID DYNAMICS
 |
| ISSN | 0309-1929 |
| Pages | 17 |
| Abstract | We 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. |
| Keyword | Thermal convection precession inertial waves rotating spheres |
| Funding Organization | 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 ; 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 |
| DOI | 10.1080/03091929.2020.1791844 |
| WOS Keyword | POINCARE EQUATION ; INERTIAL WAVES ; LIQUID ; ONSET ; FLOWS |
| Language | 英语 |
| Funding Project | Science 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 Organization | 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 ; 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 Area | Astronomy & Astrophysics ; Geochemistry & Geophysics ; Mechanics |
| WOS Subject | Astronomy & Astrophysics ; Geochemistry & Geophysics ; Mechanics |
| WOS ID | WOS:000552532900001 |
| Publisher | TAYLOR & FRANCIS LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.bao.ac.cn/handle/114a11/82619 |
| Collection | 中国科学院国家天文台 |
| Corresponding Author | Zhang, Keke |
| Affiliation | 1.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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