Local size segregation in polydisperse hard sphere fluids

Citation
I. Pagonabarraga et al., Local size segregation in polydisperse hard sphere fluids, PHYS REV L, 84(5), 2000, pp. 911-914
Citations number
26
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
84
Issue
5
Year of publication
2000
Pages
911 - 914
Database
ISI
SICI code
0031-9007(20000131)84:5<911:LSSIPH>2.0.ZU;2-1
Abstract
The structure of polydisperse hard sphere fluids, in the presence of a wall , is studied by the Rosenfeld density functional theory. Within this approa ch, the local excess free energy depends on only four combinations of the f ull set of density fields. The case of continuous polydispersity thereby be comes tractable. We predict, generically, an oscillatory size segregation c lose to the wall, and connect this, by a perturbation theory for narrow dis tributions, with the reversible work for changing the size of one particle in a monodisperse reference fluid.