Nonlinear hydrodynamic stability

Details Nonlinear hydrodynamic stability Nonlinear hydrodynamic stability

1997-07-28

arxiv.org/abs/chao-dyn/9707022v1

Nonlinear Sciences

Chaotic Dynamics

3 pages, 1 eps figure

Scientific paper

10.1103/PhysRevLett.80.972

The variational principle of V. I. Arnold [J. Appl. Math. Mech. Vol. 29, P. 1002 (1965)] is extended to the general conservative inhomogeneous, compressible, and conducting fluid. The concept of iso-vortical flows is generalized to an "invariant foliation" of the phase space. The foliation, which may or may not correspond to explicit conservation laws, is derived from the equations of motion and used for Lyapunov stability. A nonlinear three-dimensional (magneto-) hydrodynamic stability criterion is formulated.

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