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Effect of Mean Flow Shear on Cross Phase and Transport Reconsidered

Abstract

We reconsider the important question of the effect of a strong mean shear flow on the transport of a passive scalar field. By incorporating the effect of resonance, we show that the flux scales with the mean shear [Formula presented] as [Formula presented]. The results also indicate that the scaling of the flux and cross phase with shear is rather weak and that the cross phase is not always more heavily suppressed than the amplitude of the turbulence. Furthermore, we show that the scalings of flux and cross phase with [Formula presented] depend on the statistics of the turbulent flow. © 2003 The American Physical Society.

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