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Structure-function hierarchies and von Karman-Howarth relations for turbulence in magnetohydrodynamical equations

Basu, Abhik and Naji, Ali and Pandit, Rahul (2014) Structure-function hierarchies and von Karman-Howarth relations for turbulence in magnetohydrodynamical equations. In: PHYSICAL REVIEW E, 89 (1).

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Official URL: http://dx.doi.org/10.1103/PhysRevE.89.012117

Abstract

We generalize the method of A. M. Polyakov, Phys. Rev. E 52, 6183 (1995)] for obtaining structure-function relations in turbulence in the stochastically forced Burgers equation, to develop structure-function hierarchies for turbulence in three models for magnetohydrodynamics (MHD). These are the Burgers analogs of MHD in one dimension Eur. Phys. J.B 9, 725 (1999)], and in three dimensions (3DMHD and 3D Hall MHD). Our study provides a convenient and unified scheme for the development of structure-function hierarchies for turbulence in a variety of coupled hydrodynamical equations. For turbulence in the three sets of MHD equations mentioned above, we obtain exact relations for third-order structure functions and their derivatives; these expressions are the analogs of the von Karman-Howarth relations for fluid turbulence. We compare our work with earlier studies of such relations in 3DMHD and 3D Hall MHD.

Item Type: Journal Article
Additional Information: copyright for this article belongs to AMER PHYSICAL SOC, ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Depositing User: Id for Latest eprints
Date Deposited: 22 May 2014 08:02
Last Modified: 22 May 2014 08:02
URI: http://eprints.iisc.ac.in/id/eprint/48879

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