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Three-dimensional turbulence without vortex stretching
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DOI：10.1017/jfm.2021.194.png)
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摘要
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We consider three-dimensional turbulence from which vortex stretching is removed. The resulting system conserves enstrophy, but does not conserve kinetic energy. Using spectral closure, it is shown that enstrophy is transferred to small scales by a direct cascade. The inviscid truncated system tends to an equipartition of enstrophy over wave vectors. No inverse cascade is observed once the scales larger than the forcing scale are in equipartition.
Keyword:
isotropic turbulence
turbulence theory
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3.9
论文数:
2.0W
被引数:
9.4W
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