Abstract
The effects of longitudinal curvature on the turbulence in thin shear layers has received a good deal of attention from experimenters and modellers and in many-respects they are now well documented. The turbulence structure is highly sensitive to the additional mean strain rate introduced when the mean streamlines are curved in the plane of the mean shear. Turbulent energy and shear stress are reduced relative to rectilinear flow when the angular momentum of the mean flow increases in the direction of the radius of curvature, as in a two-dimensional boundary layer on a convex wall, and increased when the angular momentum decreases with increasing radius, as in concave wall flow. In contrast to laminar flow where the fractional changes in shear stress are of the same order as the shear layer thickness to the radius of curvature, measurements in turbulent boundary layes on curved walls show fractional changes an order of magnitude greater.
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Gibson, M.M. (1985). Effects of Streamline Curvature on Turbulence. In: Davis, S.H., Lumley, J.L. (eds) Frontiers in Fluid Mechanics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-46543-7_10
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DOI: https://doi.org/10.1007/978-3-642-46543-7_10
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