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Effects of Pore Walls and Randomness on Phase Transitions in Porous Media

Marek Cieplak·Amos Maritan·Michael R. Swift·Flavio Toigo·Jayanth R. Banavar
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Abstract

We study spin models within the mean field approximation to elucidate the topology of the phase diagrams of systems modeling the liquid-vapor transition and the separation of He$^3$--He$^4$ mixtures in periodic porous media. These topologies are found to be identical to those of the corresponding random field and random anisotropy spin systems with a bimodal distribution of the randomness. Our results suggest that the presence of walls (periodic or otherwise) are a key factor determining the nature of the phase diagram in porous media.

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Marek Cieplak, Amos Maritan, Michael R. Swift, Flavio Toigo, Jayanth R. Banavar. 2002-10-01. Effects of Pore Walls and Randomness on Phase Transitions in Porous Media. https://doi.org/10.1103/physreve.66.056124

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