Abstract
The Lagrangian average (LA) of the ideal fluid equations preserves their transport structure. This transport structure is responsible for the Kelvin circulation theorem of the LA flow and, hence, for its convection of potential vorticity and its conservation of helicity. Lagrangian averaging also preserves the Euler-Poincaré (EP) variational framework that implies the LA fluid equations. This is expressed in the Lagrangian-averaged Euler- Poincaré (LAEP) theorem proven here and illustrated for the Lagrangian average Euler (LAE) equations.
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© 2001 Springer Science+Business Media Dordrecht
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Holm, D.D. (2001). Variational Principles, Geometry and Topology of Lagrangian-Averaged Fluid Dynamics. In: Ricca, R.L. (eds) An Introduction to the Geometry and Topology of Fluid Flows. NATO Science Series, vol 47. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0446-6_14
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DOI: https://doi.org/10.1007/978-94-010-0446-6_14
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-0207-6
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