Triad interactions in a forced turbulence
Triad interactions in a forced turbulence
复制标题
强迫湍流中的三元相互作用
DOI:
10.1063/1.858296
复制
发表时间:
1992
影响因子:
4.6
通讯作者:
S. Kida
中科院分区:
文献类型:
--
作者:
K. Ohkitani;S. Kida
An analysis of the data of a direct numerical simulation of a forced incompressible isotropic turbulence at a high Reynolds number (Rλ≊180) is made to investigate the interaction among three Fourier modes of wave numbers that form a triangle. The triad interaction is classified into six types according to the direction of the energy transfer to each Fourier mode: (+,+,−), (+,−,+), (+,−,−), (−,+,+), (−,+,−), (−,−,+), where the + (or −) denotes the energy gain (or loss) of the modes of the largest, the intermediate, and the smallest wave numbers in this order. The last three types of the interaction are very few. In the first type of the interaction, a comparable amount of energy is exchanged typically among three modes of comparable magnitude of wave numbers. In the second and third types, the magnitudes of the larger two wave numbers are comparable and much larger than the smallest one, and a great amount of energy is exchanged between the former two. This behavior of the triad interaction agrees very wel...
DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
通讯作者:
--