Abstract
Direct numerical simulation (DNS) of decaying isotropic three-dimensional (3D) magnetohydrodynamic (MHD) turbulence based on the 10243-modes in a periodic box is used for studying the statistical properties of turbulence. In this paper, the presence of intermittency in MHD turbulence is investigated through the analysis of the probability distribution function (PDF) for Elsässer fields and total energy fluctuations. We observe that the PDFs of the Elsässer fields fluctuations display strong non-Gaussian behavior at small scale, which can be ascribed to multifractality feature, while the PDFs of the total energy fluctuations have the same shape over all observed scales and are monofractal. The PDFs have stretched exponential tail and satisfy the function P(∣δX∣)∼exp (−A∣δX∣μ). Numerically, we extract the exponent μ and find that it is constant for monofractal behavior as the length scale varies. To check the notion of self-similarity in the respective fluctuations, we apply the compensated structure functions which could be a reliable way in turbulence.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
