MTI scaling laws. Volume average of the turbulent injection length (top), the velocity fluctuation strength (middle), and specific APE (bottom), as a function of the volume-averaged thermal diffusivity, for all simulations in Table 2. Diamonds (respectively, circles) correspond to runs with Spitzer (respectively, constant diffusivity) conduction profile; while the colour blue (resp. red) stands for 2D (resp. 3D) runs.