Effects of vortex organization on heat transfer enhancement by Gortler instability
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
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Gortler vortices, which appear due to streamline curvature in a boundary layer, drastically modify the momentum and heat-transfer properties of the boundary layer. Gortler instability and, as such, heat transfer enhancement by Gortler 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 Gortler vortices. (C) 2004 Elsevier SAS. All rights reserved.