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| Natura: | Artículo científico |
| Lingua: | en |
| Pubblicazione: |
Sociedade Brasileira de Física
2004
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| Accesso online: | https://www.redalyc.org/articulo.oa?id=46434102 |
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Sommario:
- The interpretation of water anomalies in terms of core-softened models E. A. Jagla Física, Astronomía y Matemáticas In the first part of this paper I review the understanding of anomalous properties of water in terms of particles interacting by core-softened potentials. I discuss the origin of the bulk anomalies in terms of the two different configurations of neighbor particles: low energyhigh volume and high energylow volume. In the second partI study some anomalies of water under strong spatial confinement, namely when it lubricates a contact betweentwo solid surfaces. Solvation and friction forces are studied as a function of lubricant thickness. Whereas for hard core particles maxima in the solvation force are correlated with maxima in the friction force, for soft core particles and appropriately chosen parameters the opposite is true. This leads to a reduction of the frictioncoefficient of about one order of magnitude in the second case. I argue that materials that expand when freezemay be modeled in terms of soft core particles, and that these materials are naturally good boundary lubricants. 2004 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46434102 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.1 Vol.34