气候变化领域集成服务门户(CCPortal): How the growth of ice depends on the fluid dynamics underneath

CCPortal

DOI	10.1073/pnas.2012870118
	How the growth of ice depends on the fluid dynamics underneath
	Wang Z.; Calzavarini E.; Sun C.; Toschi F.
发表日期	2021
ISSN	00278424
卷号	118 期号:10
英文摘要	Convective flows coupled with solidification or melting in water bodies play a major role in shaping geophysical landscapes. Particularly in relation to the global climate warming scenario, it is essential to be able to accurately quantify how water-body environments dynamically interplay with ice formation or melting process. Previous studies have revealed the complex nature of the icing process, but have often ignored one of the most remarkable particularities of water, its density anomaly, and the induced stratification layers interacting and coupling in a complex way in the presence of turbulence. By combining experiments, numerical simulations, and theoretical modeling, we investigate solidification of freshwater, properly considering phase transition, water density anomaly, and real physical properties of ice and water phases, which we show to be essential for correctly predicting the different qualitative and quantitative behaviors. We identify, with increasing thermal driving, four distinct flow-dynamics regimes, where different levels of coupling among ice front and stably and unstably stratified water layers occur. Despite the complex interaction between the ice front and fluid motions, remarkably, the average ice thickness and growth rate can be well captured with the theoretical model. It is revealed that the thermal driving has major effects on the temporal evolution of the global icing process, which can vary from a few days to a few hours in the current parameter regime. Our model can be applied to general situations where the icing dynamics occur under different thermal and geometrical conditions. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Density anomaly; Hydrodynamic turbulence; Ice dynamics; Rayleigh–Bénard convection; Solidification
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/180409
作者单位	Center for Combustion Energy, Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Energy and Power Engineering, Tsinghua University, Beijing, 100084, China; Unité de Mécanique de Lille–J. Boussinesq, Unité Labellisée de Recherche 7512, Université Lille, Lille, F-59000, France; Department of Engineering Mechanics, School of Aerospace Engineering, Tsinghua University, Beijing, 100084, China; Department of Applied Physics, Eindhoven University of Technology, Eindhoven, 5600 MB, Netherlands; Istituto per le Applicazioni del Calcolo “M. Picone”–Consiglio Nazionale delle Ricerche, Rome, I-00185, Italy
推荐引用方式 GB/T 7714	Wang Z.,Calzavarini E.,Sun C.,et al. How the growth of ice depends on the fluid dynamics underneath[J],2021,118(10).
APA	Wang Z.,Calzavarini E.,Sun C.,&Toschi F..(2021).How the growth of ice depends on the fluid dynamics underneath.Proceedings of the National Academy of Sciences of the United States of America,118(10).
MLA	Wang Z.,et al."How the growth of ice depends on the fluid dynamics underneath".Proceedings of the National Academy of Sciences of the United States of America 118.10(2021).