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Dynamics of liquid nano-threads : fluctuation-driven instability and rupture
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Zhao, Chengxi, Lockerby, Duncan A. and Sprittles, James E. (2020) Dynamics of liquid nano-threads : fluctuation-driven instability and rupture. Physical Review Fluids, 5 . 044201. doi:10.1103/PhysRevFluids.5.044201
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Official URL: http://dx.doi.org/10.1103/PhysRevFluids.5.044201
Abstract
The instability and rupture of nanoscale liquid threads is shown to strongly depend on thermal fluctuations. These fluctuations are naturally occurring within molecular dynamics (MD) simulations and can be incorporated via fluctuating hydrodynamics into a stochastic lubrication equation (SLE). A simple and robust numerical scheme is developed for the SLE that is validated against MD for both the initial (linear) instability and the nonlinear rupture process. Particular attention is paid to the rupture process and its statistics, where the `double-cone’ profile reported by Moseler & Landmann [Science, 2000, 289(5482): 1165-1169] is observed, as well as other distinct profile forms depending on the flow conditions. Comparison to the Eggers’ similarity solution [Physical Review Letters, 2002, 89(8): 084502], a power law of the minimum thread radius against time to rupture, shows agreement only at low surface tension; indicating that surface tension cannot generally be neglected when considering rupture dynamics.
| Item Type: | Journal Article | |||||||||||||||
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| Subjects: | Q Science > QA Mathematics Q Science > QC Physics Q Science > QP Physiology |
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| Divisions: | Faculty of Science > Engineering Faculty of Science > Mathematics |
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| Library of Congress Subject Headings (LCSH): | Liquids, Molecular dynamics, Stochastic matrices | |||||||||||||||
| Journal or Publication Title: | Physical Review Fluids | |||||||||||||||
| Publisher: | American Physical Society | |||||||||||||||
| ISSN: | 2469-990X | |||||||||||||||
| Official Date: | 2 April 2020 | |||||||||||||||
| Dates: |
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| Date of first compliant deposit: | 11 March 2020 | |||||||||||||||
| Date of first compliant Open Access: | 18 March 2020 | |||||||||||||||
| Volume: | 5 | |||||||||||||||
| Article Number: | 044201 | |||||||||||||||
| DOI: | 10.1103/PhysRevFluids.5.044201 | |||||||||||||||
| Status: | Peer Reviewed | |||||||||||||||
| Publication Status: | Published | |||||||||||||||
| Access rights to Published version: | Restricted or Subscription Access | |||||||||||||||
| Copyright Holders: | © 2020 American Physical Society | |||||||||||||||
| RIOXX Funder/Project Grant: |
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