Wave Equation for Sound in Fluids with Vorticity

Santiago Esteban Perez Bergliaffa; Katrina Hibberd; Michael Stone; Matt Visser

doi:10.1016/j.physd.2003.11.007

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Wave Equation for Sound in Fluids with Vorticity

Santiago Esteban Perez Bergliaffa·Katrina Hibberd·Michael Stone·Matt Visser

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Abstract

We use Clebsch potentials and an action principle to derive a closed system of gauge invariant equations for sound superposed on a general background flow. Our system reduces to the Unruh (1981) and Pierce (1990) wave equations when the flow is irrotational, or slowly varying. We illustrate our formalism by applying it to waves propagating in a uniformly rotating fluid where the sound modes hybridize with inertial waves.

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Santiago Esteban Perez Bergliaffa, Katrina Hibberd, Michael Stone, Matt Visser. 2001-06-13. Wave Equation for Sound in Fluids with Vorticity. https://doi.org/10.1016/j.physd.2003.11.007

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