Original language | English |
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Number of pages | 6 |
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Journal | Physical Review E |
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DOIs | |
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Publication status | Published - 4 Jan 2019 |
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We explore the effect of the magnetic Prandtl number Pm on energy and dissipation in fully resolved direct numerical simulations of steady-state, mechanically forced homogeneous magnetohydrodynamic turbulence in the range Pm = 1/32 to 32. We compare the spectra and show that if the simulations are not fully resolved, the steepness of the scaling of the kinetic-to-magnetic dissipation ratio with Pm is overestimated. We also present results of decaying turbulence with helical and nonhelical magnetic fields, where we find nonhelical reverse spectral transfer for Pm <1. The results of this systematic analysis have applications including stars, planetary dynamos, and accretion disks.
- physics.flu-dyn, astro-ph.CO, physics.plasm-ph
ID: 79604036