Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
1996-10-07
Physics
Condensed Matter
Soft Condensed Matter
Four pages, revtex, two .eps files, uses epsf.sty
Scientific paper
A nonlinear two-fluid stochastic hydrodynamical description of velocity and concentration fluctuations in sedimenting suspensions is constructed, and analyzed using self-consistent (SC) and renormalization group (RG) methods. The advection of particles by velocity fluctuations is shown to be ``relevant'' in all dimensions $d < 6$ . Both RG and SC analyses predict a strong reduction in the dependence of velocity fluctuations on system-size $L$ relative to the $L^{1/2}$ obtained in the linearized theory of Caflisch and Luke [Phys. Fluids {\bf 28}, 785 (1985)]. This is an important step towards resolving a ten-year old puzzle in the field.
Bruinsma Robijn
Levine Alex
Ramaswamy Sriram
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