The effect of a strong adverse pressure gradient on the turbulent structure in an equilibrium boundary layer was studied using two-point space-time correlations. The correlations from the adverse pressure gradient layer were found to be inclined at a considerably higher angle with respect to the wall in the inner region than in the corresponding zero pressure gradient reference case. A wavelet analysis of the correlation data showed that differences in the inclination angle exist at all length scales larger than the boundary layer thickness. The inclination angle for the conventionally averaged correlation contours was found to be in close agreement with the inclinations derived from the wavelet filtered contours corresponding to the most energetic wave numbers.
Structure Inclination Angle in a Turbulent Adverse Pressure Gradient Boundary Layer
Contributed by the Fluids Engineering Division for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received by the Fluids Engineering Division May 30, 2000; revised manuscript received January 31, 2002. Associate Editor: P. W. Bearman.
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Krogstad, P., and Kaspersen, J. H. (December 4, 2002). "Structure Inclination Angle in a Turbulent Adverse Pressure Gradient Boundary Layer ." ASME. J. Fluids Eng. December 2002; 124(4): 1025–1033. https://doi.org/10.1115/1.1511161
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