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Simple improvements to classical bubble nucleation models

PhysRevE.92.022401.pdf414.66 kBPDF見る/開く

タイトル: Simple improvements to classical bubble nucleation models
著者: Tanaka, Kyoko K. 著作を一覧する
Tanaka, Hidekazu 著作を一覧する
Angelil, Raymond 著作を一覧する
Diemand, Juerg 著作を一覧する
発行日: 2015年 8月 3日
出版者: American Physical Society
誌名: Physical review E
巻: 92
号: 2
開始ページ: 22401
出版社 DOI: 10.1103/PhysRevE.92.022401
抄録: 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
資料タイプ: article
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 田中 秀和


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