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A numerical study of vortex merging in mixing layers (1985)

Davis, R. W. ; Moore, E. F.

[S.l.] : American Institute of Physics (AIP)

Physics of Fluids 28 (1985), S. 1626-1635

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ISSN: 1089-7666

Source: AIP Digital Archive

Topics: Physics

Notes: Numerical solutions are presented for forced spatially developing axisymmetric and two-dimensional mixing layers. The numerical scheme employs quadratic upwind differencing for convection and a Leith type of temporal differencing in order to solve the incompressible Navier–Stokes and continuity equations. The applied forcing function is derived from linear inviscid stability theory. The resulting large-scale vortex dynamics is visualized by means of streakline and isovorticity contour plots. It is seen that the vortex merging behavior in both types of mixing layers is determined by the subharmonics present in the forcing function. Manipulation of the vortex dynamics in a predictable fashion is possible through alterations in the frequency content of this applied forcing. Reynolds number is shown to be of only minor importance.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.864954

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