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Simple improvements to classical bubble nucleation models

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Title: Simple improvements to classical bubble nucleation models
Authors: Tanaka, Kyoko K. Browse this author
Tanaka, Hidekazu Browse this author →KAKEN DB
Angelil, Raymond Browse this author
Diemand, Juerg Browse this author
Issue Date: 3-Aug-2015
Publisher: American Physical Society
Journal Title: Physical review E
Volume: 92
Issue: 2
Start Page: 22401
Publisher DOI: 10.1103/PhysRevE.92.022401
PMID: 26382410
Abstract: We revisit classical nucleation theory (CNT) for the homogeneous bubble nucleation rate and improve the classical formula using a correct prefactor in the nucleation rate. Most of the previous theoretical studies have used the constant prefactor determined by the bubble growth due to the evaporation process from the bubble surface. However, the growth of bubbles is also regulated by the thermal conduction, the viscosity, and the inertia of liquid motion. These effects can decrease the prefactor significantly, especially when the liquid pressure is much smaller than the equilibrium one. The deviation in the nucleation rate between the improved formula and the CNT can be as large as several orders of magnitude. Our improved, accurate prefactor and recent advances in molecular dynamics simulations and laboratory experiments for argon bubble nucleation enable us to precisely constrain the free energy barrier for bubble nucleation. Assuming the correction to the CNT free energy is of the functional form suggested by Tolman, the precise evaluations of the free energy barriers suggest the Tolman length is similar or equal to 0.3 sigma independently of the temperature for argon bubble nucleation, where sigma is the unit length of the Lennard-Jones potential. With this Tolman correction and our prefactor one gets accurate bubble nucleation rate predictions in the parameter range probed by current experiments and molecular dynamics simulations.
Rights: ©2015 American Physical Society
Type: article
Appears in Collections:低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 田中 秀和

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