Can a difference in molecular weights cause an eruption in a driven flow of self-organizing immiscible system?
Naval Research Laboratory, Stennis Space Center, MS, 39529, USA
2 Department of Physics and Astronomy University of Southern Mississippi, Hattiesburg, MS, 39406-5046, USA
Corresponding author: a email@example.com
Revised: 27 November 2007
Published online: 23 January 2008
Driven flow of a non-equilibrium non-conservative (NENC) system with a mixture of immiscible particles (A,B of molecular weight MA, MB) exhibits self-organizing patterns (segregation, phase-separation, etc.) in steady-state. The flow response (v) of mass flux density (j) to bias (H), in steady-state is found to be sensitive to molecular weight ratio (α = MB/MA). While the flux density (j) responds linearly to bias for both components (A, B) at α = 1, onset of eruptive response occurs at extreme bias (H ↦ 1) at α > 1 where v ↦∞ for heavier (B) and v ↦- ∞ for lighter (A) constituents. Difference in molecular weights (MA, MB) is not only critical to eruptive flow but also in controlling the flow response prior to this crossover.
PACS: 61.43.Bn – Structural modeling: serial-addition models, computer simulation / 83.10.Rs – Computer simulation of molecular and particle dynamics
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2008