Predictability in two-dimensional decaying turbulence

被引：24
作者：
Boffetta, G
Celani, A
Crisanti, A
Vulpiani, A
机构：
[1] INFM, SEZ TORINO, TURIN, ITALY
[2] POLITECN TORINO, DIPARTIMENTO INGN AERONAUT & SPEZIALE, I-10129 TURIN, ITALY
[3] UNIV ROMA LA SAPIENZA, DIPARTIMENTO FIS, I-00185 ROME, ITALY
[4] INFM, SEZ ROMA, ROME, ITALY
来源：
PHYSICS OF FLUIDS | 1997年 / 9卷 / 03期
关键词：
D O I：
10.1063/1.869227
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Predictability problem for two-dimensional decaying turbulence is addressed by means of numerical simulations. Qualitative and quantitative comparisons with previous results obtained by closure approximations are critically examined. It is found that, as for other features of two-dimensional turbulence, the role of coherent vortices is essential for a correct interpretation of the results, A Lagrangian, vortex-based, definition for the growth of incertitudes leads in general to an enhancement of the predictability time. (C) 1997 American Institute of Physics.
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收藏
页码：724 / 734
页数：11
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