Nonuniversality and finite dissipation in magnetohydrodynamic turbulence
Data CreatorLinkmann, Moritz F.
McComb, W. David
McKay, Mairi E.
PublisherUniversity of Edinburgh. School of Physics and Astronomy
Relation (Is Referenced By)http://arxiv.org/abs/1502.06439
MetadataShow full item record
CitationLinkmann, Moritz F.; Berera, Arjun; McComb, W. David; McKay, Mairi E. (2015). Nonuniversality and finite dissipation in magnetohydrodynamic turbulence, [dataset]. University of Edinburgh. School of Physics and Astronomy. http://dx.doi.org/10.7488/ds/247.
DescriptionThis dataset contains the results of the study discussed in the paper 'Nonuniversality and finite dissipation in decaying magnetohydrodynamic turbulence': "A model equation for the Reynolds number dependence of the dimensionless dissipation rate in freely decaying homogeneous magnetohydrodynamic turbulence in the absence of a mean magnetic field is derived from the real-space energy balance equation, leading to Cε=Cε,∞+C/Rz−+O(1/R2z−)), where Rz− is a generalized Reynolds number. The constant Cε,∞ describes the total energy transfer flux. This flux depends on magnetic and cross helicities, because these affect the nonlinear transfer of energy, suggesting that the value of Cε,∞ is not universal. Direct numerical simulations were conducted on up to 20483 grid points, showing good agreement between data and the model. The model suggests that the magnitude of cosmological-scale magnetic fields is controlled by the values of the vector field correlations. The ideas introduced here can be used to derive similar model equations for other turbulent systems." [paper abstract]
series CHH runs (maximal magnetic helicity and relative cross helicity = 0.2, 0.4 and 0.8) (280bytes)