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摘要
En 中文
The question of whether significant subvolumes of a turbulent flow can be identified by automatic means, independently of a priori assumptions, is addressed using the example of two-dimensional decaying turbulence. Significance is defined as influence on the future evolution of the flow, and the problem is cast as an unsupervised machine 'game' in which the rules are the Navier-Stokes equations. It is shown that significance is an intermittent quantity in this particular flow, and that, in accordance with previous intuition, its most significant features are vortices, while the least significant ones are dominated by strain. Subject to cost considerations, the method should be applicable to more general turbulent flows.
Keyword:
computational methods
mathematical foundations
turbulence theory
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期刊
IF:
3.9
论文数:
2.0W
被引数:
9.4W
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