2 papers
math.AP2026
Secular Instability and the Turning-Point Principle for Rigidly Rotating Viscous Stars
Ming Cheng, Zhiwu Lin, Yucong Wang
We study axisymmetric stability of rigidly rotating viscous stars modeled by the free-boundary Navier--Stokes--Poisson (NSP) system. The unstable index of the linearized NSP genera…
math.AP2023
Dynamical magneto-rotational instability
Zhiwu Lin, Yucong Wang, Wenpei Wu
Magneto-rotational instability (MRI) is an important instability mechanism for rotating flows with magnetic fields. In particular, when the strength of the magnetic field tends to…