Revisiting the fluctuating vorticity field in the centerplane of a turbulent channel flow, we show that the vorticity is distinctly anisotropic at low Reynolds numbers (Re). This result is in contrast with some earlier conclusions. The anisotropy is a function of Re, and we have compiled data to show that the anisotropy gradually vanishes with increasing Re. Acknowledging the anisotropy is important for current efforts on simulating turbulent particle suspensions.
On the Anisotropic Vorticity in Turbulent Channel Flows
Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received June 10, 2014; final manuscript received February 24, 2015; published online April 28, 2015. Assoc. Editor: Sharath S. Girimaji.
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Andersson, H. I., Zhao, L., and Variano, E. A. (August 1, 2015). "On the Anisotropic Vorticity in Turbulent Channel Flows." ASME. J. Fluids Eng. August 2015; 137(8): 084503. https://doi.org/10.1115/1.4030003
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