Abstract
Time series measurements of the spanwise vorticity fluctuations in a large single stream shear layer have been acquired. The magnitude of the fluctuations, as measured by the standard deviation, was normalized using dissipation variables and compared at two streamwise locations. These data indicate that the vorticity fluctuations do not follow a self similar form. Rather, it was found that the values increase in magnitude with downstream distance. An explanation of this phenomenon is provided.
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References
Balint, J.L., Wallace, J.M., 1988 “Statistical properties of the vorticity field of a two-stream turbulent mixing layer,” Advances in Turbulence 2, Springer-Verlag, NY.
J.M. Bruns, R.C. Haw, and J.F. Foss, 1991, “The Velocity and Transverse Vorticity Fields in a Single Stream Shear Layer,” proc. Eighth Turbulent Shear Flows Conference, T.U. Munich, 9-11, pp. 3–1–1 to 3-1-6.
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Morris, S.C, 2002, Ph.D Thesis, Dept. of Mechanical Engineering, Mich. State University.
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Morris, S.C., Foss, J. (2004). The Non Self Similar Scaling of Vorticity in a Shear Layer. In: Smits, A.J. (eds) IUTAM Symposium on Reynolds Number Scaling in Turbulent Flow. Fluid Mechanics and its Applications, vol 74. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-0997-3_12
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DOI: https://doi.org/10.1007/978-94-007-0997-3_12
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