Turbulent Relative Dispersion in Two-Dimensional Free Convection Turbulence

Details Turbulent Relative Dispersion in Two-Dimensional Free Convection Turbulence Turbulent Relative Dispersion in Two-Dimensional Free Convection Turbulence

2006-03-16

arxiv.org/abs/nlin/0603036v1

Nonlinear Sciences

Chaotic Dynamics

13 pages, 21 figures

Scientific paper

10.1143/JPSJ.75.104402

The relative dispersion process in two-dimensional free convection turbulence is investigated by direct numerical simulation. In the inertial range, the growth of relative separation, $r$, is expected as $\propto t^5$ according to the Bolgiano-Obukhov scaling. The result supporting the scaling is obtained with exit-time statistics. Detailed investigation of exit-time PDF shows that the PDF is divided into two regions, the Region-I and -II, reflecting two types of separating processes: persistent expansion and random transitions between expansion and compression of relative separation. This is consistent with the physical picture of the self-similar telegraph model. In addition, a method for estimating the parameters of the model are presented. Comparing two turbulence cases, two-dimensional free convection and inverse cascade turbulence, the relation between the drift term of the model and nature of coherent structures is discussed.

Affiliated with

Also associated with

No associations

Rating

Turbulent Relative Dispersion in Two-Dimensional Free Convection Turbulence 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 Turbulent Relative Dispersion in Two-Dimensional Free Convection Turbulence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Turbulent Relative Dispersion in Two-Dimensional Free Convection Turbulence will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-481368