Eckhardt, B. ; Pandit, Rahul (2003) Noise correlations in shear flows The European Physical Journal B - Condensed Matter and Complex Systems, 33 (3). pp. 373-378. ISSN 1434-6028
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Official URL: http://www.springerlink.com/content/gdwuq8tqfv819y...
Related URL: http://dx.doi.org/10.1140/epjb/e2003-00178-3
Abstract
We consider the effects of a shear on velocity fluctuations in a flow. The shear gives rise to a transient amplification that not only influences the amplitude of perturbations but also their time correlations. We show that, in the presence of white noise, time correlations of transversal velocity components are exponential and that correlations of the longitudinal components are exponential with an algebraic prefactor. Cross correlations between transversal and downstream components are strongly asymmetric and provide a clear indication of non-normal amplification. We suggest experimental tests of our predictions.
Item Type: | Article |
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Source: | Copyright of this article belongs to Springer. |
ID Code: | 33730 |
Deposited On: | 30 Mar 2011 12:36 |
Last Modified: | 17 May 2016 16:37 |
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