Abstract
The applicability of Local Stability Theory (LST), Parabolized Stability Equations (PSE) and the Adaptive Harmonic Linearized Navier-Stokes (AHLNS) approach is investigated in the presence of 2-D surface irregularities through comparison with Direct Numerical Simulations (DNS). Remarkably good agreement between DNS and AHLNS is obtained for the amplification curves of Tollmien-Schlichting (TS) waves in all the cases studied. The LST and PSE results exhibit differences which are discussed in relation to the local distortion of the boundary layer induced by the irregularities.
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Acknowledgements
The financial support of SSeMID, Stability and Sensitivity Methods for Industrial Design, funded by European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie Grant Agreement No. 675008, and from the Clean Sky 2 Joint Undertaking under the European Union’s Horizon 2020 research and innovation programme under Grant Agreement No. CS2-AIR-GAM-2014-2015-01 are gratefully acknowledged.
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Tocci, F., Franco, J.A., Hein, S., Chauvat, G., Hanifi, A. (2021). The Effect of 2-D Surface Irregularities on Laminar-Turbulent Transition: A Comparison of Numerical Methodologies. In: Dillmann, A., Heller, G., Krämer, E., Wagner, C. (eds) New Results in Numerical and Experimental Fluid Mechanics XIII. STAB/DGLR Symposium 2020. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 151. Springer, Cham. https://doi.org/10.1007/978-3-030-79561-0_24
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DOI: https://doi.org/10.1007/978-3-030-79561-0_24
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