期刊
JOURNAL OF FLUID MECHANICS
卷 605, 期 -, 页码 355-366出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0022112008001511
关键词
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In order to investigate the physical mechanism of the energy cascade in homogeneous isotropic turbulence, the internal energy and its transfer rate are defined as a function of scale, space and time. Direct numerical simulation of turbulence at a moderate Reynolds number verifies that the energy cascade can be caused by the successive creation of smaller-scale tubular vortices in the larger-scale straining regions existing between pairs of larger-scale tubular vortices. Movies are available with the online version of the paper.
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