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   -> Volume 5, Issue 2


Preprint: MRA of simulated radiative convective turbulence
 
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fournier@cloudy.geology.yale.edu (Aime' Fournier)
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PostPosted: Wed Dec 04, 2002 9:49 am    
Subject: Preprint: MRA of simulated radiative convective turbulence
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Preprint: MRA of simulated radiative convective turbulence

Preprint: MRA of simulated radiative convective turbulence

A new preprint,

"Wavelet multiresolution analysis of numerically simulated 3d
radiative convection" (SPIE proceedings series volume 2762: Wavelet
Applications III, editor Harold H. Szu, 8-12 April 1996, Orlando)

and an old reprint,

"Wavelet representation of lower-atmospheric long nonlinear wave
dynamics, governed by the Benjamin-Davis-Ono-Burgers equation" (WD 4.3
#3)

are now both available at

http://cloudy.geology.yale.edu/~fournier/html/proceedings.html

and

ftp://flint.geology.yale.edu/pub/fournier/mansrc.ps
ftp://flint.geology.yale.edu/pub/fournier/wrnlwd.ps.z

or by request.

Here is the abstract of the new preprint:

A wavelet multiresolution analysis is performed on atmospheric fields
simulated by a multilevel 3-dimensional atmospheric boundary layer
model. Wavelet cospectra of the vertical wind and potential
temperature are calculated and compared with radial Fourier cospectra.
The former indicate most of the field variance to have horizontal
scales roughly equal to the vertical scale, as should be the case for
convectively driven turbulence. Fourier spectra exhibit a -3 power
law, suggesting that the statistics may depend only on a quantity with
units of time. Observations of time- and scale-dependent structures
suggest certain physical mechanisms at work. The multiresolution
analysis analogue of turbulent energy equations are formulated. This
framework supports the proposed physical mechanisms.

(This work made use of WaveLab,
http://playfair.stanford.edu/~wavelab/)

Comments would be appreciated.

Aime' Fournier tel: 203 432 3146
Yale University fax: 203 432 3134
Dept of Geology and Geophysics http://cloudy.geology.yale.edu/~fournier
PO Box 208109
New Haven CT 06520-8109 USA
All times are GMT + 1 Hour
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