# Parametric instability in a free-evolving warped protoplanetary disc

@article{Deng2020ParametricII, title={Parametric instability in a free-evolving warped protoplanetary disc}, author={Hongping Deng and Gordon I. Ogilvie and Lucio Mayer}, journal={Monthly Notices of the Royal Astronomical Society}, year={2020}, volume={500}, pages={4248-4256} }

Warped accretion discs of low viscosity are prone to hydrodynamic instability due to parametric resonance of inertial waves as confirmed by local simulations. Global simulations of warped discs, using either smoothed particle hydrodynamics (SPH) or grid-based codes, are ubiquitous but no such instability has been seen. Here we utilize a hybrid Godunov-type Lagrangian method to study parametric instability in global simulations of warped Keplerian discs at unprecedentedly high resolution (up toβ¦Β

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