Touching the classical scaling in penetrative convection
文献类型：期刊论文
| 作者 | Ouyang, Zhen1; Wang Q(王淇)2; Li K(李凯)3 ; Wen, Baole4; Ding ZJ(丁子敬)1,3
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| 刊名 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
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| 出版日期 | 2025-02-01 |
| 卷号 | 122期号:6 |
| 关键词 | penetrative turbulence scaling law coherent rolls Enceladus |
| ISSN号 | 0027-8424 |
| DOI | 10.1073/pnas.2418468122 |
| 英文摘要 | The Cassini missions have identified the tiger stripes on Enceladus as the source of both thermal emission and plume jets. The hot spots in the tiger stripes are highly localized, and the plumes suggest active hydrothermal processes within the subglacial ocean of Enceladus. However, understanding the mechanism responsible for the heat anomalies in the tiger stripes remains a challenge. About 60 y ago, geoscientist George Veronis proposed a model for cold water oceans, along with the classical notion of a 1/3 scaling relationship between vertical heat transfer and the Rayleigh number (Ra), a dimensionless number representing the strength of buoyancy driving the convection within the fluid body. In this study, by delving into the steady coherent rolls arising in Veronis' model, we first confirm the existence of the classical scaling as proposed. We identify two distinct pathways, characterized by different flow patterns, that converge to the unified classical scaling. In scenarios where stratification resulting from the density's nonlinear temperature dependence is insignificant, convection rolls with fixed (width-to-height) aspect ratios achieve the classical scaling as Ra approaches infinity. Conversely, under high stratification levels, convection rolls with a heat-transport- maximizing aspect ratio achieve the classical scaling. This investigation also reveals a notable correspondence between optimal coherent rolls and turbulent flow patterns. Based on these coherent rolls, we offer insights into the formation of heat anomalies in the tiger stripes. The predicted heat flux through the ocean and the lateral flow length, are consistent with the measurements obtained by the Cassini spacecraft. |
| 分类号 | 二类/Q1 |
| WOS研究方向 | Multidisciplinary Sciences ; Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:001434123200006 |
| 资助机构 | Z.O., K.L., and Z.D. are supported by National Key R&D Program of China (Grant No. 2022YFF0503501) , Z.O. and Z.D. are supported by Investigation into Turbulence Transport in Spheres under Multiphysics Fields (Grant No. KJZ-YY-NLT0604) and the National Natural Science Foundation of China (Grant No. 52176065) and Q.W. is supported by the National Natural Science Foundation of China (Grant No. 42350002) . |
| 其他责任者 | 丁子敬 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/101441]  |
| 专题 | 力学研究所_国家微重力实验室 |
| 作者单位 | 1.Harbin Institute of Technology; 2.Southern University of Science & Technology; 3.Institute of Mechanics, CAS; 4.New York Institute Technology |
| 推荐引用方式 GB/T 7714 | Ouyang, Zhen,Wang Q,Li K,et al. Touching the classical scaling in penetrative convection[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2025,122(6). |
| APA | Ouyang, Zhen,王淇,李凯,Wen, Baole,&丁子敬.(2025).Touching the classical scaling in penetrative convection.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,122(6). |
| MLA | Ouyang, Zhen,et al."Touching the classical scaling in penetrative convection".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 122.6(2025). |
入库方式： OAI收割
来源：力学研究所
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