用Gledzer-Ohkitani-Yamada壳模型计算三维湍流相对弥散
Three-dimensional turbulent relative dispersion by the Gledzer-Ohkitani-Yamada shell model
摘要：
本文研究了三维不可压缩高雷诺数湍流中的电子对色散，该湍流是通过对Gledzer-Ohkitani-Yamada（GOY）壳模型的动力学进行傅立叶变换而产生的。结果表明，GOY壳模型可以成功地再现湍流相对色散的Batchelor和Richardson-Obukhov两种状态。我们还研究了交叉时间尺度与粒子对的初始分离，并将其与Batchelor的预测进行比较。
英文摘要：
We study pair dispersion in a three-dimensional incompressible high Reynolds number turbulent flow generated by Fourier transforming the dynamics of the Gledzer-Ohkitani-Yamada (GOY) shell model into real space. We show that GOY shell model can successfully reproduce both the Batchelor and the Richardson-Obukhov regimes of turbulent relative dispersion. We also study how the crossover time scales with the initial separations of a particle pair and compare it to the prediction by Batchelor.
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