title: Homogeneous nucleation of water in argon. Nucleation rate computation from molecular simulations of TIP4P and TIP4P/2005 water model.
abstract: Molecular dynamics (MD) simulations were conducted to study nucleation of water at 350 K in argon using TIP4P and TIP4P/2005 water models. We found that the stability of any cluster, even if large, strongly depends on the energetic interactions with its vicinity, while the stable clusters change their composition almost entirely during nucleation. Using the threshold method, direct nucleation rates are obtained. Our nucleation rates are found to be 1.08×1027cm-3s-1for TIP4P and 2.30×1027cm-3s-1for TIP4P/2005. The latter model prescribes a faster dynamics than the former, with a nucleation rate two times larger due to its higher electrostatic charges. The non-equilibrium water densities derived from simulations and state-of-art equilibrium parameters from Vega and de Miguel [J. Chem. Phys. 126, 154707 (2007)] are used for the classical nucleation theory (CNT) prediction. The CNT overestimates our results for both water models, where TIP4P/2005 shows largest discrepancy. Our results complement earlier data at high nucleation rates and supersaturations in the Hale plot [Phys. Rev. A 33, 4156 (1986)], and are consistent with MD data on the SPC/E and the TIP4P/2005 model.
authors.affiliation: Department of Mechanical Engineering, Eindhoven University of Technology, 5600 Eindhoven, The Netherlands.
authors.forename: Lucia R
authors.identifier: 0000000264078312
authors.initials: LR
authors.lastname: Dumitrescu
authors.affiliation: Department of Mechanical Engineering, Eindhoven University of Technology, 5600 Eindhoven, The Netherlands.
authors.forename: David M J
authors.initials: DM
authors.lastname: Smeulders
authors.affiliation: Department of Mechanical Engineering, Eindhoven University of Technology, 5600 Eindhoven, The Netherlands.
authors.forename: Jacques A M
authors.initials: JA
authors.lastname: Dam
authors.affiliation: Department of Mechanical Engineering, Eindhoven University of Technology, 5600 Eindhoven, The Netherlands.
authors.forename: Silvia V
authors.initials: SV
authors.lastname: Gaastra-Nedea