MULTISCALE STATISTICAL MODEL OF FULLY-DEVELOPED TURBULENCE PARTICLE ACCELERATIONS

作者：Chen Wen^*; Sun Hongguang

来源：Modern Physics Letters B, 2009, 23(3): 449-452.

DOI：10.1142/s021798490901862x

• Anomalous diffusion
• probability density function
• Tsallis distribution
• stretched Gaussian distribution
• fractal derivative

Based on the experimental measurement results of fluid particle transverse accelerations in fully developed pipe turbulence published in Nature (2001) by La Porta et al, the present authors recently develop a multiscale statistical model which considers both normal diffusion in molecular scale and anomalous diffusion in vortex scale. This model gives rise to a new probability density function, called Power-Stretched Gaussian Distribution model (PSGD). In this study, we make a further comparison of this statistical distribution model with the well-known Levy distribution, Tsallis distribution and stretched-exponential distribution. Our model is found to have the following merits: 1) fewer parameters, 2) better fitting with experimental data, 3) more explicit physical interpretation.

• 出版日期2009-1-30
• 单位河海大学