One type of these phenomena is subject to Onsager-Feynman quantization and 
One type of these phenomena is subject to Onsager-Feynman quantization and is the product of a phase discontinuity between the "zero" and "pi" regions of a long Josephson junction. In another type of these phenomena, the B-field is proportional to a zeroth-order Bessel function of the quotient of radial distance and London penetration depth. The Lamb-Oseen model describes dissipative effects in these phenomena, which can produce oscillations with frequency proportional to the (*) Strouhal number. Type II superconductors exhibit a magnetic variety of these phenomena named for Abrikosov. For 10 points, Helmholtz's theorems apply to fluid flows in the vicinity of what phenomena, which can form a von KÃ¡rmÃ¡n street and are characterized by a namesake quantity equal to the curl of the velocity field?
One type of these phenomena is subject to Onsager-Feynman quantization and is the product of a phase discontinuity between the "zero" and "pi" regions of a long Josephson junction.
vortices [or a vortex; accept "fluxons" before "Lamb-Oseen model," but do not accept or prompt thereafter]