Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2007-02-13
Phys. Rev. E, vol. 76, 066315 (2007)
Physics
Condensed Matter
Statistical Mechanics
8 pages, 1 figure, revtex4
Scientific paper
10.1103/PhysRevE.76.066315
We analyze the behavior of an ensemble of inertial particles in a one-dimensional smooth Gaussian velocity field, in the limit of large inertia, but considering a finite correlation time for the random field. We derive in this limit a perturbative scheme for the calculation of the concentration correlation and of the particle relative velocity distribution, providing analytical expressions for the concentration fluctuation amplitude, its correlation length, and the modification in the particle pair relative velocity variance. The amplitude of the concentration fluctuations is characterized by slow decay at large inertia and a much larger correlation length than that of the random field. The fluctuation structure in velocity space is very different from predictions from short-time correlated random velocity fields, with only few particle pairs crossing at sufficiently small relative velocity to produce correlations. Concentration fluctuations are associated with depletion of the relative velocity variance of colliding particles.
Olla Piero
Vuolo Raffaella
No associations
LandOfFree
Concentration fluctuations of large Stokes number particles in a one-dimensional random velocity field does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Concentration fluctuations of large Stokes number particles in a one-dimensional random velocity field, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Concentration fluctuations of large Stokes number particles in a one-dimensional random velocity field will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-409438