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Subscribe to receive Zoom link While gas dynamics have been studied in local and global numerical simulations for inner regions ( 10AU) of protoplanetary disks (PPDs), global simulations applicable to outer regions ( 30AU) of PPDs are still lacking. On the other hand, it is revealed in the recent years that the magneto-rotational instability (MRI) is damped or suppressed in a large part of the disk, and hydrodynamic instabilities become crucial to drive turbulence in PPDs. In this talk, I will present our recent results on gas dynamics of outer PPDs through global 2D and 3D non-ideal MHD si...

14:00 If you have a question about this talk, please contact Dr Can Cui. Turbulence has a profound impact on the evolution of gas and dust in protoplanetary disks (PPDs), from driving the collisions and the diffusion of dust grains, to the concentration of pebbles in giant vortices, thus, facilitating planetesimal formation. The Vertical Shear Instability (VSI) is a hydrodynamic mechanism, operating in PPDs if the local rate of thermal relaxation is high enough. Previous studies of the VSI have, however, relied on the assumption of constant cooling rates, or neglected the finite coupling ti...