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DOI	10.1073/pnas.2020701118
	Elastic amplification of the Rayleigh–Taylor instability in solidifying melts
	Jambon-Puillet E.; Piéchaud M.R.; Brun P.-T.
发表日期	2021
ISSN	00278424
卷号	118 期号:10
英文摘要	The concomitant mechanical deformation and solidification of melts are relevant to a broad range of phenomena. Examples include the preparation of cotton candy, the atomization of metals, the manufacture of glass fibers, and the formation of elongated structures in volcanic eruptions known as Pele’s hair. Usually, solid-like deformations during solidification are neglected as the melt is much more malleable in its initial liquid-like form. Here we demonstrate how elastic deformations in the midst of solidification, i.e., while the melt responds as a very soft solid (G ∼ 100 Pa), can lead to the formation of previously unknown periodic structures. Namely, we generate an array of droplets on a thin layer of liquid elastomer melt coated on the outside of a rotating cylinder through the Rayleigh–Taylor instability. Then, as the melt cures and goes through its gelation point, the rotation speed is increased and the drops stretch into hairs. The ongoing solidification eventually hardens the material, permanently “freezing” these elastic deformations into a patterned solid. Using experiments, simulation, and theory, we demonstrate that the formation of our two-step patterns can be rationalized when combining the tools from fluid mechanics, elasticity, and statistics. Our study therefore provides a framework to analyze multistep pattern formation processes and harness them to assemble complex materials. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Fluid–elastic coupling; Pattern formation; Soft materials; 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/180431
作者单位	Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ 08540, United States
推荐引用方式 GB/T 7714	Jambon-Puillet E.,Piéchaud M.R.,Brun P.-T.. Elastic amplification of the Rayleigh–Taylor instability in solidifying melts[J],2021,118(10).
APA	Jambon-Puillet E.,Piéchaud M.R.,&Brun P.-T..(2021).Elastic amplification of the Rayleigh–Taylor instability in solidifying melts.Proceedings of the National Academy of Sciences of the United States of America,118(10).
MLA	Jambon-Puillet E.,et al."Elastic amplification of the Rayleigh–Taylor instability in solidifying melts".Proceedings of the National Academy of Sciences of the United States of America 118.10(2021).