Yu Zhang (MMM Univ. Wien and Macau Univ. Science & Technology) 
WPI Seminar Room, 8th floor, Fak.Math. OMP1 
Tue, 16. Jan 24, 14:30 
Numerical Methods for Hydrodynamic Simulations and Linear Stability Analysis 
In this presentation, three projects are sketched:
1) FPlane Approximation for Solar Simulation:
We introduced the fplane approximation into the ANTARES code and ran 3D solar simulation with
and without rotation, attempting to analyze how much influence rotation would have on the convection structures.
2) Linear Stability Analysis of an Incompressible Fluid with Vertical Shear in Fplane:
Shear instability and GSF instability are two possible sources of extra mixing in stars to explain the differences between
theoretical stellar evolution models and observations. We consider an incompressible fluid with vertical shear in fplane and try to find out what really happens when shear instabilities coexist with GSF instabilities.
3) The Stability Analysis of Polar Cyclones on Saturn and Jupiter:
The longlived cyclones in the polar regions of Jupiter and Saturn have
been explored for a long time. We aim to explain the number and location of Jupiterâ€™s circumpolar cyclones and the absence of those on Saturn by linear stability analysis.
This is ongoing joint work with O. Koch, F. Kupka and N.J. Mauser. 
 Thematic program: Models in Plasmas, Earth and Space Science (2023/2024)
 Event: Working group on 'Numerical methods for solar simulations' (2024)
