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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

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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
Subjects: Q Science > QA Mathematics > QA76 Electronic computers. Computer science. Computer software
Q Science > QP Physiology
T Technology > TA Engineering (General). Civil engineering (General)
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:
DateEvent
9 October 2019Published
20 August 2019Available
20 August 2019Accepted
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:
Project/Grant IDRIOXX Funder NameFunder ID
EP/N016602/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
EP/P020887/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
EP/P031684/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
UNSPECIFIEDLeverhulme Trusthttp://dx.doi.org/10.13039/501100000275
713548H2020 Marie Skłodowska-Curie Actionshttp://dx.doi.org/10.13039/100010665
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