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Paper detail

Wave Equation for Sound in Fluids with Vorticity

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.

preprint2001arXivOpen access
Santiago Esteban Perez BergliaffaKatrina HibberdMichael StoneMatt Visser
cond-matgr-qcphysics.flu-dyn
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Santiago Esteban Perez BergliaffaKatrina HibberdMichael StoneMatt Visser

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