Single-time Markovianized spectral closure in fluid turbulence

Single-time Markovianized spectral closure in fluid turbulence
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流体湍流中的单次马尔可夫谱闭合

DOI:
10.1017/jfm.2020.415
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发表时间:
2020
影响因子:
3.7
通讯作者:
Kitamura Takuya
Kitamura Takuya
中科院分区:
工程技术2区
文献类型:
--
作者:
Ryosuke Oyanagi;Atsushi Okamoto;Noriyoshi Tsuchiya;大石慎也,淺見拓哉,三浦 光;Kitamura Takuya

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Kaneda’s (J. Fluid Mech., vol. 107, 1981, pp. 131–145) Lagrangian renormalized approximation was extended to single-time spectral closure under two assumptions: (i) Markovianization and (ii) the Lagrangian velocity response function is expressed by , i.e. the present closure is derived from the Navier–Stokes equation without introduction of any adjustable parameters and it can calculate the statistical quantities by theory. The results show that the present closure has good agreement with direct numerical simulation for single- and two-point statistics.
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