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| Stability analysis of wakes with density gradient
Dongshin Shin
The Journal of Mechanical Science and Technology, vol. 25, no. 1, pp.111-115, 2011
Abstract : This paper investigates the linear stability of wakes with special emphasis on the difference of velocity and density. Velocity and density
profiles for laminar flows have gaussian profiles. Incompressible wakes have two generalized inflection points and two unstable
modes-sinuous and varicose modes. Sinuous modes are more unstable than varicose modes irrespective of density variation, which
shows wakes will be destabilized by sinuous modes. Large velocity difference and density difference lead to more unstable wakes due to
large momentum difference.
Keyword : Instability; Wakes; Density gradient; Sinuous and varicose modes |
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