@inproceedings{ef368c1884bc45d1a7c24c70f8ef2c3f,
title = "Effect of localized wall cooling or heating on streaks in high-speed boundary layers: AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021",
abstract = "High-amplitude upstream disturbances and wall surface roughness elements trigger streamwise/G{\"o}rtler vortices and the associated streaks in boundary layers over flat or concave surfaces. Following the transient growth phase, the fully-developed vortices become sensitive to inviscid secondary instabilities, which ultimately result in a premature transition to turbulence. Our work aims at investigating the effect of cooling/heating on the initiation and development of such streaks in an attempt to gain a better understanding of the conditions and governing mechanisms leading to secondary instabilities in high-speed compressible boundary layers. We conduct a parametric study via a robust and efficient numerical solution to the non-linear compressible boundary region equations (NCBRE) to identify the impact of varying the wall temperature on the development of streaks in supersonic and hypersonic boundary layer flows.",
keywords = "localized wall cooling, heating, streaks, high-speed boundary layers",
author = "{Es Sahli}, Omar and Adrian Sescu and Mohammad Koshuriyan and Yuji Hattori and Makoto Hirota",
year = "2021",
month = jan,
day = "4",
doi = "10.2514/6.2021-0853",
language = "English",
series = "AIAA Scitech 2021 Forum",
booktitle = "AIAA Scitech 2021 Forum",
}