Closure of two-dimensional turbulence: The role of pressure gradients

被引：3
|
作者：
Boffetta, G
Cencini, M
Davoudi, J
机构：
[1] Univ Turin, Dipartimento Fis Gen, I-10125 Turin, Italy
[2] Univ Turin, INFM, I-10125 Turin, Italy
[3] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy
[4] Univ Roma La Sapienza, INFM, I-00185 Rome, Italy
[5] Observ Cote Azur, F-06304 Nice 4, France
[6] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
[7] Univ Marburg, Fachbereich Phys, D-35032 Marburg, Germany
来源：
PHYSICAL REVIEW E | 2002年 / 66卷 / 01期
关键词：
D O I：
10.1103/PhysRevE.66.017301
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
Inverse energy cascade regime of two-dimensional turbulence is investigated by means of high resolution numerical simulations. Numerical computations of conditional averages of transverse pressure gradient increments are found to be compatible with a recently proposed self-consistent Gaussian model. An analogous low-order closure model for the longitudinal pressure gradient is proposed and its validity is numerically examined. In this case numerical evidence for the presence of higher-order terms in the closure is found. The fundamental role of conditional statistics between longitudinal and transverse components is highlighted.
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页数：4
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