Decay of scalar variance in isotropic turbulence in a bounded domain

Details Decay of scalar variance in isotropic turbulence in a bounded domain Decay of scalar variance in isotropic turbulence in a bounded domain

2007-12-18

arxiv.org/abs/0712.2994v1

Journal of turbulence 8, 4 (2007) 1

Physics

Classical Physics

Scientific paper

10.1080/14685240601091676

The decay of scalar variance in isotropic turbulence in a bounded domain is investigated. Extending the study of Touil, Bertoglio and Shao (2002; Journal of Turbulence, 03, 49) to the case of a passive scalar, the effect of the finite size of the domain on the lengthscales of turbulent eddies and scalar structures is studied by truncating the infrared range of the wavenumber spectra. Analytical arguments based on a simple model for the spectral distributions show that the decay exponent for the variance of scalar fluctuations is proportional to the ratio of the Kolmogorov constant to the Corrsin-Obukhov constant. This result is verified by closure calculations in which the Corrsin-Obukhov constant is artificially varied. Large-eddy simulations provide support to the results and give an estimation of the value of the decay exponent and of the scalar to velocity time scale ratio.

Affiliated with

Also associated with

No associations

Rating

Decay of scalar variance in isotropic turbulence in a bounded domain 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 Decay of scalar variance in isotropic turbulence in a bounded domain, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Decay of scalar variance in isotropic turbulence in a bounded domain will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-549749