2008
DOI: 10.1063/1.2980349
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On the linear and nonlinear development of Görtler vortices

Abstract: The linear and nonlinear developments of Görtler vortices were experimentally investigated by means of hot-wire anemometer measurement. The wavelengths of the vortices were preset to be the most amplified using thin perturbation wires. Three different vortex wavelengths of 12, 15, and 20 mm were considered. These wavelengths were preserved downstream which confirm the prediction of the most amplified wavelength of Görtler vortices. The onset of the nonlinear region occurs at about the same Görtler number of 5.… Show more

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Cited by 35 publications
(33 citation statements)
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“…A significant increase of the wall shear stress occurs again at x = 750 mm as a result of the increased mixing due to the onset of turbulence. This is confirmed by the increase of the turbulence intensity near the wall, as reported by Tandiono et al (2008). As shown in Fig.…”
Section: Resultssupporting
confidence: 74%
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“…A significant increase of the wall shear stress occurs again at x = 750 mm as a result of the increased mixing due to the onset of turbulence. This is confirmed by the increase of the turbulence intensity near the wall, as reported by Tandiono et al (2008). As shown in Fig.…”
Section: Resultssupporting
confidence: 74%
“…1) and the instrumentation system have been previously described by Tandiono et al (2008). However, a brief description will be given for the convenience of the readers.…”
Section: Details Of Experimentsmentioning
confidence: 99%
“…This motivates the present paper. We report spatial DNS of the flow over concave walls with three different radii of curvature, of which one matches the wall curvature in the experiments by Tandiono, Winoto & Shah (2008) and Tandiono et al (2009) We demonstrate that the receptivity to vortical free-stream disturbances can be linear or nonlinear, considering both single vortical modes ( § 2) and free-stream turbulence ( § 3). An alternative source of receptivity -localized wall roughness -is also studied in § 2.…”
Section: Secondary Instability and Breakdownmentioning
confidence: 96%
“…When presenting the results we will follow convention and use the tangential, normal and spanwise plate coordinates ξ , η and z instead. The computational domain shown in figure 1(a) covers about 60 % of the wind-tunnel test section of Tandiono et al (2008) with a radius of wall curvature of 1 m. The Table 1. Parameters of the SEM grids.…”
Section: Receptivity and Growthmentioning
confidence: 99%
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