Repository: Freie Universität Berlin, Math Department

Molecular dynamics of open systems: construction of a mean-field particle reservoir

Delle Site, L. and Krekeler, C. and Whittaker, J. and Agarwal, A. and Klein, R. and Höflling, F. (2019) Molecular dynamics of open systems: construction of a mean-field particle reservoir. Adv. Th. Simul . (Submitted)

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Official URL: https://arxiv.org/abs/1902.07067

Abstract

The simulation of open molecular systems requires explicit or implicit reservoirs of energy and particles. Whereas full atomistic resolution is desired in the region of interest, there is some freedom in the implementation of the reservoirs. Here, we construct a combined, explicit reservoir by interfacing the atomistic region with regions of point-like, non-interacting particles (tracers) embedded in a thermodynamic mean field. The tracer molecules acquire atomistic resolution upon entering the atomistic region and equilibrate with this environment, while atomistic molecules become tracers governed by an effective mean-field potential after crossing the atomistic boundary. The approach is extensively tested on thermodynamic, structural, and dynamic properties of liquid water. Conceptual and numerical advantages of the procedure as well as new perspectives are highlighted and discussed.

Item Type:Article
Subjects:Mathematical and Computer Sciences > Mathematics > Applied Mathematics
Divisions:Department of Mathematics and Computer Science > Institute of Mathematics > Geophysical Fluid Dynamics Group
ID Code:2319
Deposited By: Ulrike Eickers
Deposited On:18 Mar 2019 12:45
Last Modified:17 May 2019 08:34

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