Scaling laws in two-dimensional turbulent convection

被引：12
|
作者：
Biskamp, D [1 ]
Hallatschek, K [1 ]
Schwarz, E [1 ]
机构：
[1] Max Planck Inst Plasma Phys, Ctr Interdisciplinary Plasma Sci, D-85748 Garching, Germany
来源：
PHYSICAL REVIEW E | 2001年 / 63卷 / 04期
关键词：
D O I：
10.1103/PhysRevE.63.045302
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：
Two-dimensional homogeneous turbulent convection is studied numerically. Though Bolgiano-Obukhov scaling is approximately valid, strong differences exist in the intermittency properties of velocity and temperature increments, where the latter are similar to those of a passive scalar. The main difference of the small-scale dynamics compared to a passive scalar arises from the Kelvin-Helmholtz instability, but this process does not affect the scaling properties. A condition for a scalar field to show the ramp-and-cliff structures of a passive scalar is discussed.
引用
收藏
页码：453021 / 453024
页数：4
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