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Updated: May 28, 2026

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
Published on: December 4, 2017
Towards a mesoscopic model of water-like fluids with hydrodynamic interactions
Irene Mazzitelli1, Maddalena Venturoli, Simone Melchionna
1IAC-CNR, via dei Taurini 9, 00185, Roma, Italy. irene.mazzitelli@gmail.com
Abstract:
We present a mesoscopic lattice model for non-ideal fluid flows with directional interactions, mimicking the effects of hydrogen bonds in water. The model supports a rich and complex structural dynamics of the orientational order parameter, and exhibits the formation of disordered domains whose size and shape depend on the relative strength of directional order and thermal diffusivity. By letting the directional forces carry an inverse density dependence, the model is able to display a correlation between ordered domains and low density regions, reflecting the idea of water as a denser liquid in the disordered state than in the ordered one.
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