Special Session 68: (In)Stability and the long time behaviour of fluid flows

Stability of equilibria to generalized Navier-Stokes-Fourier system

Petr Kaplicky
Charles University
Czech Rep
Co-Author(s):    A. Abbatiello, M. Bul\`\i\v cek
Abstract:
We consider a generalized Newtonian incompressible heat conducting fluid with prescribed nonuniform temperature on the boundary and with the no-slip boundary conditions for the velocity. The fluid occupies a three dimensional domain. No external body forces are applied to the fluid. In dependence on the growth of the constitutively determined part of the Cauchy stress we identify different classes of proper solutions that converge to the equilibria exponentially in a suitable metric. Consequently, the equilibrium is nonlinearly stable and attracts all weak solutions from these classes. We also show that these classes are nonempty.