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Paper: Effects of Two-scale Driving on Turbulence Statistics
Volume: 498, Numerical Modeling of Space Plasma Flows ASTRONUM-2014
Page: 27
Authors: Yoo, H.; Cho, J.
Abstract: Turbulence is ubiquitous in astrophysical fluids such as the interstellar medium and the intracluster medium. In turbulence studies, it is customary to assume that fluid is driven on a single scale. However, in astrophysical fluids, there can be many different driving mechanisms that act on different scales. If there are multiple energy injection scales, the process of energy cascade and turbulence dynamo will be different compared with the case of single energy-injection scale. In this work, we perform 3-dimensional incompressible magnetohydrodynamic turbulence simulations. We drive turbulence in Fourier space in two wavenumber ranges, 2≤k≤√12 (large-scale) and 15 ≲k≲ 26 (small-scale). We show how kinetic and magnetic spectra are affected by the two-scale energy injections.
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