Growth of density inhomogeneities in a flow of wave turbulence

Details Growth of density inhomogeneities in a flow of wave turbulence Growth of density inhomogeneities in a flow of wave turbulence

2004-01-11

arxiv.org/abs/nlin/0401012v1

Nonlinear Sciences

Chaotic Dynamics

4 pages, 1 figure

Scientific paper

We consider an advection of a passive scalar by a flow which is a superposition of random waves. We find that such a flow can lead to an exponential growth of the passive scalar fluctuations. We calculate the growth rate at the fourth order in wave amplitudes and find it non-zero when either both solenoidal and potential components are present in the flow or there are potential waves with the same frequencies but different wavenumbers.

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