Rayleigh-Taylor instability in variable density swirling flows |
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Authors: | B Dipierro M Abid |
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Institution: | 1.IRPHE - UMR 6594,Technopole de Chateau-Gombert,Marseille Cedex 13,France |
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Abstract: | Using linear instability theory and nonlinear dynamics, the Rayleigh-Taylor instability
of variable density swirling flows is studied. It is found that the flow topology could be
predicted, when the instability sets in, using a function χ dependent on
density and axial and azimuthal velocities. It is shown that even when the inner
axial-flow is heavier than the outer one (a favorable case for the development of the
Rayleigh-Taylor instability thanks to the centrifugal force) the instability is not
necessarily Rayleigh-Taylor-dominated. It is also shown that when the Rayleigh-Taylor
instability develops, it is helical. |
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Keywords: | |
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