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Absence of simulation evidence for critical depletion in slit-pores

Nigel B. Wilding·Martin Schoen
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Abstract

Recent Monte Carlo simulation studies of a Lennard-Jones fluid confined to a mesoscopic slit-pore have reported evidence for ``critical depletion'' in the pore local number density near the liquid-vapour critical point. In this note we demonstrate that the observed depletion effect is in fact a simulation artifact arising from small systematic errors associated with the use of long range corrections for the potential truncation. Owing to the large near-critical compressibility, these errors lead to significant changes in the pore local number density. We suggest ways of avoiding similar problems in future studies of confined fluids.

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Nigel B. Wilding, Martin Schoen. 1999-02-15. Absence of simulation evidence for critical depletion in slit-pores. https://doi.org/10.1103/physreve.60.1081

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