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arXiv 1012.0461cond-mat.stat-mechhep-th
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湍流动力学的重整化群分析

Renormalization Group Analysis of Turbulent Hydrodynamics

Dirk Barbi, Gernot Münster

摘要:

湍流动力学的特征在于其结构函数的普适标度性。调查这些职能的基本框架已确定由哥洛夫在1941年。然而,他对标度指数的预测偏离了实验和数值模拟中发现的数字。从纳维-斯托克斯方程出发推导这些偏差是理论物理学的一个挑战。重整化群被认为是一个非常有前途的工具,用于分析湍流系统,但推导的结构函数的标度特性迄今尚未实现。在这项工作中,我们回顾所涉及的问题,提出了一种方法的框架内的确切重正化组,以克服它们,并提出第一个数值结果。

英文摘要:

Turbulent hydrodynamics is characterised by universal scaling properties of its structure functions. The basic framework for investigations of these functions has been set by Kolmogorov in 1941. His predictions for the scaling exponents, however, deviate from the numbers found in experiments and numerical simulations. It is a challenge for theoretical physics to derive these deviations on the basis of the Navier-Stokes equations. The renormalisation group is believed to be a very promising tool for the analysis of turbulent systems, but a derivation of the scaling properties of the structure functions has so far not been achieved. In this work, we recall the problems involved, present an approach in the framework of the exact renormalisation group to overcome them, and present first numerical results.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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