Intermittency in passive scalar advection
Intermittency in passive scalar advection
复制标题
DOI：
10.1103/physrevlett.80.5532
复制
发表时间：
1998-06-22
影响因子：
8.6
通讯作者：
Vergassola, M
中科院分区：
文献类型：
--
作者：
Frisch, U;Mazzino, A;Vergassola, M
介绍了Kraichnan被动标量模型的拉格朗日数值模拟方法。该方法基于示踪轨迹的蒙特卡罗模拟，辅以重合点的分点程序。观察到标量结构函数的净标度行为。利用该格式研究了标量异常与平流速度场标度指数xi的关系。具体考虑了三维四阶结构函数。
A Lagrangian method for the numerical simulation of the Kraichnan passive scalar model is introduced. The method is based on Monte Carlo simulations of tracer trajectories, supplemented by a point-splitting procedure for coinciding points. Clean scaling behavior for scalar structure functions is observed. The scheme is exploited to investigate the dependence of scalar anomalies on the scaling exponent xi of the advecting velocity field. The three-dimensional fourth-order structure function is specifically considered.