Nonlinear Sciences – Chaotic Dynamics
Scientific paper
2009-04-04
Nonlinear Sciences
Chaotic Dynamics
6 pages, 9 figures, submitted to TSFP6 Conference, 2009, Seoul, Korea
Scientific paper
Rotation modulates turbulence causing columnar structuring of a turbulent flow in case of sufficiently strong rotation. This yields significant changes in the flow characteristics and dispersion properties, which makes rotational turbulence modulation particularly relevant in the context of atmospheric and oceanic flows. Here we investigate the canonical flow of turbulence in a periodic box, subjected to rotation about a fixed vertical axis. As point of reference we consider direct numerical simulations of homogeneous isotropic turbulence. Modulation due to rotation at various rotation rates (i.e., different Rossby numbers) is investigated. Special attention is paid to the alteration of intermittency, which is measured in terms of changes in the scaling of the structure functions. A reduction of intermittency quantified with the longitudinal structure functions in the direction perpendicular to the rotation axes will be presented. These numerical findings correspond well to recent results obtained in experiments by Seiwert et al. (2008).
Geurts Bernard J.
Holm Darryl D.
Kuczaj Arkadiusz K.
No associations
LandOfFree
Intermittency effects in rotating decaying 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 Intermittency effects in rotating decaying turbulence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Intermittency effects in rotating decaying turbulence will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-123251