A model relating Eulerian spatial and temporal velocity correlations

Cholemari, Murali R. ; Arakeri, Jaywant H. (2006) A model relating Eulerian spatial and temporal velocity correlations Journal of Fluid Mechanics, 551 . pp. 19-29. ISSN 0022-1120

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Official URL: http://journals.cambridge.org/action/displayAbstra...

Related URL: http://dx.doi.org/10.1017/S0022112005008074


In this paper we propose a model to relate Eulerian spatial and temporal velocity autocorrelations in homogeneous, isotropic and stationary turbulence. We model the decorrelation as the eddies of various scales becoming decorrelated. This enables us to connect the spatial and temporal separations required for a certain decorrelation through the 'eddy scale'. Given either the spatial or the temporal velocity correlation, we obtain the 'eddy scale' and the rate at which the decorrelation proceeds. This leads to a spatial separation from the temporal correlation and a temporal separation from the spatial correlation, at any given value of the correlation relating the two correlations. We test the model using experimental data from a stationary axisymmetric turbulent flow with homogeneity along the axis.

Item Type:Article
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ID Code:67949
Deposited On:02 Nov 2011 02:56
Last Modified:02 Nov 2011 02:56

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