SELF-ORGANIZED PHASE SEGREGATION IN A DRIVEN FLOW OF DISSIMILAR PARTICLES MIXTURES

R. B. Pandey, J. F. Gettrust, Ray Seyfarth and Luis A. Cueva-Parra
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R. B. Pandey: Naval Research Laboratory, Stennis Space Center, MS 39529, USA;
J. F. Gettrust: Naval Research Laboratory, Stennis Space Center, MS 39529, USA
Ray Seyfarth: Department of Computer Science and Statistics, University of Southern Mississippi, Hattiesburg, MS 39406-5106, USA
Luis A. Cueva-Parra: Department of Physics and Astronomy, University of Southern Mississippi, Hattiesburg, MS 39406-5046, USA

International Journal of Modern Physics C (IJMPC), 2003, vol. 14, issue 07, 955-962

Abstract: Self-organized patterns in an immiscible fluid mixture of dissimilar particles driven from a source at the bottom are examined as a function of hydrostatic pressure bias by a Monte Carlo computer simulation. As the upward pressure bias competes with sedimentation due to gravity, a multi-phase system emerges: a dissociating solid phase from the source is separated from a migrating gas phase towards the top by an interface of mixed (bi-continuous) phase. Scaling of solid-to-gas phase with the altitude is nonuniversal and depends on both the range of the height/depth and the magnitude of the pressure bias. Onset of phase separation and layering is pronounced at low bias range.

Keywords: Self-organized pattern; layering; phase separation; lattice gas (search for similar items in EconPapers)
Date: 2003
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DOI: 10.1142/S0129183103005108

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