Vortex equations. The vorticity transport equation provides an interesting inter-pretation of the kinematic viscosity ν: The kinematic viscosity is the diffusion coefficient for the diffusion of vorticity. Introduce vortex stretching, vortex tilting, and viscous diffusion of vorticity The photo at the right is of a laboratory vortex breakdown provided by Professor Sarpkaya at the Naval Postgraduate School in Monterey, California. These equations are a straightforward general-ization of the vortex equations on U2 which were introduced in 1950 by Ginzburg and Landau [10] in the theory of superconductivity. The 'strength' of a vortex tube (also called vortex flux) [13] is the integral of the vorticity across a cross-section of the tube, and is the same everywhere along the tube (because vorticity has zero A vortex ̀„lament is an idealization in which a tube is represented by a single vortex line of nonzero strength. ) 2. Under these highly controlled conditions the bubble-like or B-mode breakdown is nicely illustrated. Return to viscous incompressible flow. 9, the turning of the vorticity vector ω toward the n -axis will generate a vorticity component along n. The Baptista metric, a conformal rescaling of the background metric by the squared Higgs eld, gives insight into these vortices, and shows that vortices can be interpreted as conical singularities superposed on In this paper we shall describe a direct existence proof for the vortex equations over a compact Riemann surface. This is a level set approach described in a paper by Harabetian, Osher, and Shu.
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