2015
DOI: 10.1017/jfm.2015.635
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Two-dimensional compressible viscous flow around a circular cylinder

Abstract: Direct numerical simulation is performed to study compressible, viscous flow around a circular cylinder. The present study considers two-dimensional, shock-free continuum flow by varying the Reynolds number between 20 and 100 and the freestream Mach number between 0 and 0.5. The results indicate that compressibility effects elongate the near wake for cases above and below the critical Reynolds number for two-dimensional flow under shedding. The wake elongation becomes more pronounced as the Reynolds number app… Show more

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Cited by 83 publications
(71 citation statements)
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“…The former is thus more susceptible to instability than the latter, for which compressibility acts as a stabilizing agent by countering the vorticity generation through mechanisms such as vorticity dilation as well as baroclinic torque [27]. A more detailed assessment reveals that the wavelength of the modes increases with Mach number in consistent with the findings of Canuto and Taira [26]. This effect is due to compressibility, which is responsible for the elongation of the recirculation region as shown in Fig.…”
Section: Naca0015 Airfoil At Stalled Conditions (Naca2d)supporting
confidence: 83%
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“…The former is thus more susceptible to instability than the latter, for which compressibility acts as a stabilizing agent by countering the vorticity generation through mechanisms such as vorticity dilation as well as baroclinic torque [27]. A more detailed assessment reveals that the wavelength of the modes increases with Mach number in consistent with the findings of Canuto and Taira [26]. This effect is due to compressibility, which is responsible for the elongation of the recirculation region as shown in Fig.…”
Section: Naca0015 Airfoil At Stalled Conditions (Naca2d)supporting
confidence: 83%
“…However, as the Mach number is increased to M = 0.5, the frequency of the most weakly damped mode decreases to ω = 0.2893. This decrease in frequency with increase in Mach number is also observed in cylinder wake study of Canuto and Taira [26]. However, the current reduction of around 24% is more drastic than the 9% obtained between M = 0 and M = 0.5 near the critical Re for the cylinder in their study.…”
Section: Naca0015 Airfoil At Stalled Conditions (Naca2d)supporting
confidence: 75%
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“…A, Details of computational grid around circular cylinder; B, Definitions of the relevant geometrical parameters of the symmetric separation region behind the cylinder [Colour figure can be viewed at wileyonlinelibrary.com]…”
Section: Resultsmentioning
confidence: 85%