Abstract
Spatial zero-crossings of fluctuating velocity and shear stress fields are investigated in a turbulent channel flow, through direct numerical simulations. It is confirmed that the Liepmann and Taylor scales resulting from spatial zero crossings coincide more or less as in experimental time-series. A simple relationship is provided for the zero-crossing frequency of shear stress signals. It is further shown that the spanwise zero-crossings of the local wall normal velocity contributes up to 80% to the dissipation near the wall.
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References
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© 2012 Springer-Verlag Berlin Heidelberg
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Sedat, T. (2012). A Note on Spatial Zero Crossings of Fluctuating Velocity Field in Wall Bounded Turbulent Flows. In: Oberlack, M., Peinke, J., Talamelli, A., Castillo, L., Hölling, M. (eds) Progress in Turbulence and Wind Energy IV. Springer Proceedings in Physics, vol 141. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-28968-2_10
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DOI: https://doi.org/10.1007/978-3-642-28968-2_10
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-28967-5
Online ISBN: 978-3-642-28968-2
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