Converging-diverging shock-driven instabilities along soft hydrogel surfaces
Name
PhysRevE.107.L022601.pdf
Description
Published version
Size
1.94 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Pickard, Daniel
Martynowych, Dmitro
Lem, Jet
Koshakji, Anwar
Lin, Shaoting
Zhao, Xuanhe
Nelson, Keith
Giovanardi, Bianca
Radovitzky, Raul
Date Issued
2023
Journal
Physical Review E
Publisher
American Physical Society (APS)
Citation
Pickard, Daniel, Martynowych, Dmitro, Lem, Jet, Koshakji, Anwar, Lin, Shaoting et al. 2023. "Converging-diverging shock-driven instabilities along soft hydrogel surfaces." Physical Review E, 107 (2).
Version
Final published version
Abstract
Intense surface eruptions are observed along the curved surface of a confined cylindrical film of hydrogel subject to laser-induced converging-diverging shock loading. Detailed numerical simulations are used to identify the dominant mechanisms causing mechanical instability. The mechanisms that produce surface instability are found to be fundamentally different from both acoustic parametric instability and shock-driven Richtmyer-Meshkov instability. The time scale of observed and simulated eruption formation is much larger than that of a single shock reflection, in stark contrast to previously studied shock-driven instabilities. Moreover, surface undulations are only found along external, as opposed to internal, soft solid boundaries. Specifically, classic bubble surface instability mechanisms do not occur in our experiments and here we comment only on the new surface undulations found along the outer boundary of solid hydrogel cylinders. Our findings indicate a new class of impulsively excited surface instability that is driven by cycles of internal shock reflections.
MIT Department
Massachusetts Institute of Technology. Department of Aeronautics and Astronautics
Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies
Massachusetts Institute of Technology. Department of Chemistry
Massachusetts Institute of Technology. Department of Mechanical Engineering
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DOI of Published Version
https://doi.org/10.1103/physreve.107.l022601
