Shearing-box simulations of MRI-driven turbulence in weakly collisional accretion discs

Understand

We present a systematic shearing-box investigation of MRI-driven turbulence in a weakly collisional plasma by including the effects of an anisotropic pressure stress, i.e.

• anisotropic (Braginskii) viscosity.
• We constrain the pressure anisotropy ($\Delta p$) to lie within the stability bounds that would be otherwise imposed by kinetic microinstabilities.
• We explore a broad region of parameter space by considering different Reynolds numbers and magnetic-field configurations, including net vertical flux, net toroidal-vertical flux and zero net flux.