Multicanonical ensemble sampling simulations have been performed to calculate the phase diagram of a Lennard-Jones fluid embedded in a fractal random matrix generated through diffusion- limited cluster aggregation. The study of the system at increasing size and constant porosity shows that the results are independent of the matrix realization but not of the size effects. A gas-liquid transition shifted with respect to bulk is found. On growing the size of the system on the high-density side of the gas-liquid coexistence curve there appears a second coexistence region between two liquid phases. These two phases are characterized by a different behaviour of the local density inside the interconnected porous structure at the same temperature and chemical potential.

De Grandis, V., Gallo, P., Rovere, M. (2006). Liquid-liquid coexistence in the phase diagram of a fluid confined in fractal porous materials. EUROPHYSICS LETTERS, 75(6), 901-907 [10.1209/epl/i2006-10216-4].

Liquid-liquid coexistence in the phase diagram of a fluid confined in fractal porous materials

GALLO, PAOLA;
2006-01-01

Abstract

Multicanonical ensemble sampling simulations have been performed to calculate the phase diagram of a Lennard-Jones fluid embedded in a fractal random matrix generated through diffusion- limited cluster aggregation. The study of the system at increasing size and constant porosity shows that the results are independent of the matrix realization but not of the size effects. A gas-liquid transition shifted with respect to bulk is found. On growing the size of the system on the high-density side of the gas-liquid coexistence curve there appears a second coexistence region between two liquid phases. These two phases are characterized by a different behaviour of the local density inside the interconnected porous structure at the same temperature and chemical potential.
De Grandis, V., Gallo, P., Rovere, M. (2006). Liquid-liquid coexistence in the phase diagram of a fluid confined in fractal porous materials. EUROPHYSICS LETTERS, 75(6), 901-907 [10.1209/epl/i2006-10216-4].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/134357
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