Numerical Simulations of the Coupling Process of Compressible Vortices
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In the present paper the dynamics of the coupling process of compressible vortex pairs is analyzed by means of extensive numerical simulations. The objective of the study is to determine the influence both of the initial vortex structure and of the compressibility. Different initial vortex structures have been considered and their influence on the vorticity dynamics has been assessed. The numerical simulations show that free vortex evolution produces vortex dipoles whose structure depends upon the initial vortex structure and on the vortex Mach number. In the presence of shock — vortex pair interaction the coupling process obeys a either a two- or three- stage mechanism dependending upon the shock strength, and nonlinear couples are formed.
KeywordsVortex Structure Vortex Pair Coupling Process Core Radius Vorticity Field
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