Vortex stretching and reconnection in a compressible fluid |
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Authors: | B K Shivamoggi |
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Institution: | (1) University of Central Florida, Orlando, FL 32816, USA |
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Abstract: | Vortex stretching in a compressible fluid is considered. Two-dimensional (2D) and axisymmetric cases are considered separately.
The flows associated with the vortices are perpendicular to the plane of the uniform straining flows. Externally-imposed density build-up near the axis leads to enhanced compactness
of the vortices — “dressed" vortices (in analogy to “dressed" charged particles in a dielectric system). The compressible
vortex flow solutions in the 2D as well as axisymmetric cases identify a length scale relevant for the compressible case which
leads to the Kadomtsev-Petviashvili spectrum for compressible turbulence. Vortex reconnection process in a compressible fluid
is shown to be possible even in the inviscid case — compressibility leads to defreezing of vortex lines in the fluid. |
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Keywords: | 47 32 -y Vortex dynamics rotating fluids |
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