Fig. 21.

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Density-averaged radial profile of the fluid parameters for different resolutions and numerical diffusion at t = 2 Gyr. From top to bottom we have: the Prandtl number, the magnetic Reynolds number and the regular Reynolds number. The Prandtl number can be see to be below unity across the whole radial extent, with a decreasing trend toward the center. There is an expected increase due to lowering artificial resistivity and also an increase in Pm due to resolution in the outer regions of the disk (≥4 kpc). Both the magnetic and regular Reynolds number can be seen to increase toward the center; however, the magnetic Reynolds number remains flatter throughout the disk than its hydrodynamic counterpart.
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