Ching ES
Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong.
Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics. 2000 Jan;61(1):R33-6. doi: 10.1103/physreve.61.r33.
The scaling behavior of the temperature structure functions in turbulent convection is found to be different for length scales below and above the Bolgiano scale. Both sets of the exponents are well described by log-Poisson statistics. The parameter beta(T) which measures the degree of intermittency is the same for the two regimes of scales and is consistent with the corresponding value for the passive scalar field. A balance between thermal forcing and nonlinear velocity advection, which is a key ingredient leading to Bolgiano scaling, is also checked.
研究发现，在湍流对流中，温度结构函数的标度行为在低于和高于博尔贾诺尺度的长度尺度上有所不同。两组指数都能很好地用对数泊松统计来描述。衡量间歇性程度的参数β(T)在两种尺度 regime 下是相同的，并且与被动标量场的相应值一致。还检验了热强迫和非线性速度平流之间的平衡，这是导致博尔贾诺标度的关键因素。
