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Effects of vortex organization on heat transfer enhancement by Görtler instability

✍ Scribed by Ladan Momayez; Pascal Dupont; Hassan Peerhossaini

Publisher
Elsevier Science
Year
2004
Tongue
French
Weight
341 KB
Volume
43
Category
Article
ISSN
1290-0729

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✦ Synopsis

Görtler vortices, which appear due to streamline curvature in a boundary layer, drastically modify the momentum and heat-transfer properties of the boundary layer.

Görtler instability and, as such, heat transfer enhancement by Görtler instability are dependent on initial conditions. In particular, the upstream perturbation wavelength affects downstream nonlinear enhancement of the heat-transfer rate. In this paper we investigate this effect and show that the shorter wavelengths of the upstream perturbations increase the heat-transfer rate of nonlinear Görtler vortices.

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