Geometric integration of a wave-vortex model

  • Cotter C
  • Reich S
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We introduce a Hamiltonian particle-mesh method for two-dimensional advection under incompressible flow fields. The method is applied to a simplified shallow-water model, called the weak-wave model, which combines slow nonlinear vortical motion with fast linear wave propagation. The advantages of the conservative particle-mesh method are demonstrated by means of the adiabatic energy exchange between vortical and wave motion. More generally, the proposed method is applicable to stable and efficient long-time simulations of other simplified geophysical fluid models. © 2003 IMACS. Published by Elsevier B.V. All rights reserved.

Author-supplied keywords

  • Balance
  • Exponential estimates
  • Geometric integration
  • Geophysical fluid dynamics
  • Symplectic integrators

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  • C. J. Cotter

  • S. Reich

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