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Lifetime of a nanodroplet : kinetic effects and regime transitions
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Rana, Anirudh Singh, Lockerby, Duncan A. and Sprittles, James E. (2019) Lifetime of a nanodroplet : kinetic effects and regime transitions. Physical Review Letters, 123 . 154501. doi:10.1103/PhysRevLett.123.154501
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Official URL: http://dx.doi.org/10.1103/PhysRevLett.123.154501
Abstract
A transition from a d2 to a d law is observed in molecular dynamics (MD) simulations when the diameter (d) of an evaporating droplet reduces to the order of the vapor’s mean free path; this cannot be explained by classical theory. This Letter shows that the d law can be predicted within the Navier-Stokes-Fourier (NSF) paradigm if a temperature-jump boundary condition derived from kinetic theory is utilized. The results from this model agree with those from MD in terms of the total lifetime, droplet radius, and temperature, while the classical d2 law underpredicts the lifetime of the droplet by a factor of 2. Theories beyond NSF are also employed in order to investigate vapor rarefaction effects within the Knudsen layer adjacent to the interface.
| Item Type: | Journal Article | ||||||||||||||||||
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| Subjects: | Q Science > QA Mathematics > QA76 Electronic computers. Computer science. Computer software Q Science > QP Physiology T Technology > TA Engineering (General). Civil engineering (General) |
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| Divisions: | Faculty of Science > Engineering | ||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Molecular dynamics, Navier-Stokes equations , Fluid dynamics, Free molecular flow | ||||||||||||||||||
| Journal or Publication Title: | Physical Review Letters | ||||||||||||||||||
| Publisher: | American Physical Society | ||||||||||||||||||
| ISSN: | 0031-9007 | ||||||||||||||||||
| Official Date: | 9 October 2019 | ||||||||||||||||||
| Dates: |
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| Volume: | 123 | ||||||||||||||||||
| Article Number: | 154501 | ||||||||||||||||||
| DOI: | 10.1103/PhysRevLett.123.154501 | ||||||||||||||||||
| Status: | Peer Reviewed | ||||||||||||||||||
| Publication Status: | Published | ||||||||||||||||||
| Publisher Statement: | © 2019 American Physical Society | ||||||||||||||||||
| Access rights to Published version: | Open Access | ||||||||||||||||||
| RIOXX Funder/Project Grant: |
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