Abstract
The wake behind an infinite span (2D) thin flat plate normal to uniform flow was examined using Direct Numerical Simulation (DNS) at \(Re = U_0 h/\nu = 1200\) and 2400. Three distinct flow regimes were identified in the wake due to the interruption of regular anti-symmetric Karman shedding. Disruption of the regular shedding (Regime M) was followed by a period of delayed roll-up (Regime L) and a longer duration of high intensity shedding (Regime H) before regular shedding resumes again. Size of the wake mean recirculation region changed with progression of the wake patters from a long-term mean length of 2.90–3.60h (L) and then 2.16h (H). Moreover, the wake turbulence characteristics were effected with the wake evolution. These effects were quantified by variations in the turbulence kinetic energy (TKE) magnitude, production, dissipation and diffusion. Spanwise instabilities were responsible for appearance of the three flow regimes. A projection of these instabilities was observed in the pressure field behind the plate.
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References
Fage, A., Johansen, F.C.: On the flow of air behind an inclined flat plate of infinite span. Proc. R. Soc. Lond. Ser A, Contain. Pap. Math. Phys. Character 116(773), 170–197 (1927)
Hemmati, A., Wood, D.H., Martinuzzi, R.J.: Characteristics of distinct flow regimes in the wake of an infinitely span normal thin flat plate. Int. J. Heat Fluid Flow (2014). (Submitted)
Kiya, M., Matsumura, M.: Incoherent turbulence structure in the near wake of a normal plate. J. Fluid Mech. 190, 343–356 (1988)
Najjar, F.M., Balachandar, S.: Low-frequency unsteadiness in the wake of a normal flat plate. J. Fluid Mech. 370, 101–147 (1998)
Najjar, F., Vanka, S.: Effects of intrinsic three-dimensioanlity on the drag characteristics of a normal flat plate. Phys. Fluids 7(10), 2516 (1995)
Najjar, F.M., Vanka, S.P.: Simulations of the unsteady separated flow past a normal flat plate. Int. J. Numer. Method Fluids 21(7), 525547 (1995)
Narasimhamurthy, V.D., Andersson, H.I.: Numerical simulation of the turbulent wake behind a normal flat plate. Int. J. Heat Fluid Flow 30(6), 1037–1043 (2009)
Rodi, W., Ferziger, J.H., Breuer, M., Pourquie, M.: Status of large eddy simulation: results of a workshop. J. Fluids Eng. 119(2), 248–262 (1997)
Wu, S.J., Miau, J.J., Hu, C.C., Chou, J.H.: On low-frequency modulations and three-dimensionality in vortex shedding behind a normal plate. J. Fluid Mech. 526, 117–146 (2005)
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Hemmati, A., Wood, D.H., Martinuzzi, R.J. (2016). Wake Dynamics Behind a Normal Thin Flat Plate at Moderate Reynolds Numbers. In: Peinke, J., Kampers, G., Oberlack, M., Wacławczyk, M., Talamelli, A. (eds) Progress in Turbulence VI. Springer Proceedings in Physics, vol 165. Springer, Cham. https://doi.org/10.1007/978-3-319-29130-7_46
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DOI: https://doi.org/10.1007/978-3-319-29130-7_46
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