Abstract

Monte Carlo calculations for liquid water in strong static electric fields are used to study dielectric, thermodynamic and structural properties. Emphasis is placed on the importance of long range interactions, particularly effects due to spherical truncation of the pair potential and to the Onsager reaction field. The Rowlinson model for pair interactions is not capable of predicting the high static dielectric constant of water and similar results are to be expected for other point charge models. It is shown that dielectric constants are very sensitive to the Onsager reaction field, whereas thermodynamic properties are somewhat insensitive. Structural effects due to dielectric saturation are demonstrated and the influence of long range interactions on such properties discussed.

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