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A gauge theory for the 2+1 dimensional incompressible Euler equations
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We show that in two dimensions the incompressible Euler equations can be re-expressed in terms of an abelian gauge theory with a Chern-Simons term. The magnetic field corresponds to fluid vorticity and the electric field is the product of the vorticity and the gradient of the stream function. This picture can be extended to active scalar models, including the surface quasi-geostrophic equation. We examine the theory in the presence of a boundary and show that the Noether charge algebra is a Kac-Moody algebra. We argue that this symmetry is associated with the nodal lines of zero magnetic field.
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Cited by 1 Pith paper
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A Gauge-Theoretic Action Principle for Viscous Incompressible Fluids
The proposed action does not demonstrably produce the Navier-Stokes equations; the velocity variation is algebraic and the gauge-field equation is only a static Helmholtz equation.
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