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Home All issues Volume 507 / No 1 (November III 2009) A&A, 507 1 (2009) 19-28 Full HTML
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Table 2:

Properties of MHD turbulence when a forcing EMF is turned on.
Model $t_{\rm avg}$ $\vert{\vec E}\vert$ $\alpha $ $\delta v_x/c_0$ $\delta v_y/c_0$ $\delta v_z/c_0$ $\beta_{\rm max}$ $\eta_{\rm t}$ $Pm_{\rm t}$
Ey-4E-10-R 50 $4 \times 10^{-10}$ $2.3 \times 10^{-2}$ 0.1214 0.1060 0.0789 $5.6 \times 10^{4}$ $1.07 \times 10^{-5}$ 1.47
Ey-4E-10-R-LONG 120 $4 \times 10^{-10}$ $2.0 \times 10^{-2}$ 0.1173 0.1001 0.0758 $5.5 \times 10^{4}$ $1.06 \times 10^{-5}$ 1.27
Ey-1E-9-R 50 $1 \times 10^{-9}$ $2.6 \times 10^{-2}$ 0.1344 0.1231 0.0896 $1.7 \times 10^{4}$ $1.46 \times 10^{-5}$ 1.21
Ey-4E-9-R 50 $4 \times 10^{-9}$ $5.2 \times 10^{-2}$ 0.1831 0.1885 0.1246 $1.6 \times 10^{3}$ $1.81 \times 10^{-5}$ 1.91
Ey-8E-9-R 50 $8 \times 10^{-9}$ $7.6 \times 10^{-2}$ 0.2209 0.2458 0.1493 $7.3 \times 10^{2}$ $2.43 \times 10^{-5}$ 2.10
Ey-4E-10-A 50 $4 \times 10^{-10}$ $1.7 \times 10^{-2}$ 0.1020 0.0846 0.0633 $5.8 \times 10^{4}$ $1.08 \times 10^{-5}$ 1.02
Ey-4E-9-A 50 $4 \times 10^{-9}$ $5.3 \times 10^{-2}$ 0.1766 0.1876 0.1189 $1.2 \times 10^{3}$ $1.56 \times 10^{-5}$ 2.28
Ey-4E-10-A-L4-lx4 48 $4 \times 10^{-10}$ $2.6 \times 10^{-2}$ 0.1242 0.1202 0.0798 $2.8 \times 10^{4}$ $3.02 \times 10^{-5}$ 0.57
Ey-4E-9-A-L4-lx4 50 $4 \times 10^{-9}$ $1.0 \times 10^{-1}$ 0.2371 0.2624 0.1555 $1.4 \times 10^{3}$ $6.68 \times 10^{-5}$ 1.00
Ey-4E-9-A-L4-lx1 50 $4 \times 10^{-9}$ $5.3 \times 10^{-2}$ 0.1789 0.1875 0.1204 $1.6 \times 10^{3}$ $1.82 \times 10^{-5}$ 1.93
Ex-4E-9-R 50 $4 \times 10^{-9}$ $2.4 \times 10^{-2}$ 0.1292 0.1162 0.08476 $5.3 \times 10^{2}$ $1.05 \times 10^{-5}$ 1.57
Ex-8E-9-R 50 $8 \times 10^{-9}$ $4.6 \times 10^{-2}$ 0.1746 0.1747 0.1160 $1.3 \times 10^{2}$ $1.01 \times 10^{-5}$ 3.00

The first column gives the model label, the second the duration over which the data are averaged, and the third the amplitude of the forcing EMF used in that case. Subsequent columns give time averaged values of various quantities of physical interest, namely the mean values of $\alpha $, the maximum value of $\beta$ (ratio between the thermal and magnetic pressure), the value of the turbulent resistivity that results from fitting the mean vertical magnetic field, and the turbulent magnetic Prandtl number of the flow.


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