Anisotropic spectra of acoustic turbulence

Anisotropic spectra of acoustic turbulence
复制标题

声湍流的各向异性谱

DOI:
--
复制
发表时间:
1999
期刊:
影响因子:
--
通讯作者:
A. Pomyalov
A. Pomyalov
中科院分区:
--
文献类型:
--
作者:
V. L’vov;Y. L’vov;A. Pomyalov

文献摘要

被引文献

相似文献

在考虑三波相互作用有限时间的广义动力学方程框架内,我们得到了具有线性色散规律{omega}(K)=ck的声湍流的普适非零态谱。这种各向异性光谱既可以是标度不变的,也可以是非标度不变的。讨论了非各向同性泵浦声学湍流演化的意义。本文的主要结果是声学湍流谱趋于各向同性。(C)2000年美国物理学会。
We found universal anizopropic spectra of acoustic turbulence with the linear dispersion law {omega}(k)=ck within the framework of generalized kinetic equation which takes into account the finite time of three-wave interactions. This anisotropic spectra can assume both scale-invariant and non-scale-invariant form. The implications for the evolution of the acoustic turbulence with nonisotropic pumping are discussed. The main result of the article is that the spectra of acoustic turbulence tend to become more isotropic. (c) 2000 The American Physical Society.