### Abstract

Results of Monte Carlo simulations with various polarizable potential models and reverse Monte Carlo simulations of water are reported at different thermodynamic state points from ambient to supercritical conditions. It is shown that polarizable potential models can reproduce the change of the experimental partial pair correlation functions of water with the temperature and density considerably better than simple nonpolarizable models. Thus, for instance, only the polarizable models can reproduce the experimentally observed elongation of the hydrogen bonds with increasing temperature and decreasing density. On the other hand, the densities of the polarizable water models decrease unexpectedly fast with increasing temperature, which affects also the reproduction of other thermodynamic properties at states of high pressure and high temperature. In analysing the properties of the hydrogen bonded clusters it is found that the space-filling percolating network of the molecules breaks down around the critical point, although a large number of hydrogen bonds still remain in the system above the critical point.

Original language | English |
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Journal | Journal of Physics Condensed Matter |

Volume | 12 |

Issue number | 8A |

Publication status | Published - 2000 |

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### ASJC Scopus subject areas

- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics

### Cite this

*Journal of Physics Condensed Matter*,

*12*(8A).

**The change of the structural and thermodynamic properties of water from ambient to supercritical conditions as seen by computer simulations.** / Jedlovszky, P.; Vallauri, Renzo; Richardi, Johannes.

Research output: Contribution to journal › Article

*Journal of Physics Condensed Matter*, vol. 12, no. 8A.

}

TY - JOUR

T1 - The change of the structural and thermodynamic properties of water from ambient to supercritical conditions as seen by computer simulations

AU - Jedlovszky, P.

AU - Vallauri, Renzo

AU - Richardi, Johannes

PY - 2000

Y1 - 2000

N2 - Results of Monte Carlo simulations with various polarizable potential models and reverse Monte Carlo simulations of water are reported at different thermodynamic state points from ambient to supercritical conditions. It is shown that polarizable potential models can reproduce the change of the experimental partial pair correlation functions of water with the temperature and density considerably better than simple nonpolarizable models. Thus, for instance, only the polarizable models can reproduce the experimentally observed elongation of the hydrogen bonds with increasing temperature and decreasing density. On the other hand, the densities of the polarizable water models decrease unexpectedly fast with increasing temperature, which affects also the reproduction of other thermodynamic properties at states of high pressure and high temperature. In analysing the properties of the hydrogen bonded clusters it is found that the space-filling percolating network of the molecules breaks down around the critical point, although a large number of hydrogen bonds still remain in the system above the critical point.

AB - Results of Monte Carlo simulations with various polarizable potential models and reverse Monte Carlo simulations of water are reported at different thermodynamic state points from ambient to supercritical conditions. It is shown that polarizable potential models can reproduce the change of the experimental partial pair correlation functions of water with the temperature and density considerably better than simple nonpolarizable models. Thus, for instance, only the polarizable models can reproduce the experimentally observed elongation of the hydrogen bonds with increasing temperature and decreasing density. On the other hand, the densities of the polarizable water models decrease unexpectedly fast with increasing temperature, which affects also the reproduction of other thermodynamic properties at states of high pressure and high temperature. In analysing the properties of the hydrogen bonded clusters it is found that the space-filling percolating network of the molecules breaks down around the critical point, although a large number of hydrogen bonds still remain in the system above the critical point.

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M3 - Article

VL - 12

JO - Journal of Physics Condensed Matter

JF - Journal of Physics Condensed Matter

SN - 0953-8984

IS - 8A

ER -