Vortex Stretching and Reconnection in a Compressible Fluid

Details Vortex Stretching and Reconnection in a Compressible Fluid Vortex Stretching and Reconnection in a Compressible Fluid

2005-09-23

arxiv.org/abs/physics/0509200v1

Physics

Fluid Dynamics

Scientific paper

10.1140/epjb/e2006-00086-0

Vortex stretching in a compressible fluid is considered. Two-dimensional 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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