Wavelike nature of the vertical shear instability in global protoplanetary discs

ABSTRACT The vertical shear instability (VSI) is a robust phenomenon in irradiated protoplanetary discs (PPDs). majority of previous numerical simulations have focused on the turbulent properties its saturated state. However, saturation VSI manifests as large-scale coherent radially travelling inertial waves. In this paper, we study inertial-wave-disc interactions and their impact saturation. Inertial-wave linear theory developed applied to representative global 2D simulation using athena++ code. It found that saturates by separating disc into several radial wave zones roughly demarcated Lindblad resonances (turning points); structure also modest variation turbulence strength. Future work should employ large domains accommodate VSI, while concurrently adopting sufficiently fine resolutions resolve parametric attacks