Oberseminsar Analysis und Theoretische Physik

Seminar Analysis and Theoretical Physics

Talk on Tuesday, December 5, 2023, at 3 p.m., room c311, main building of the university; Prof. Dr. Gieri Simonett, Vanderbilt University Nashville; On magnetoviscoelastic fluids in 3D

On magnetoviscoelastic fluids in 3D

I will introduce a thermodynamically consistent model for a magnetoviscoelastic fluid in 3D. Existence, uniqueness, and asymptotic behavior of strong solutions is studied in the framework of quasilinear parabolic systems and maximal regularity in $L_p$-spaces. It will be shown that the critical points of the entropy functional with prescribed energy correspond exactly to the equilibria of the system. Constant equilibria are normally stable: solutions that start close to a constant equilibrium exist globally and converge exponentially fast to a (possibly different) constant equilibrium. Moreover, it will be shown that the negative entropy serves as a strict Lyapunov functional and that every solution that is eventually bounded in the topology of the natural state space exists globally and converges to the set of equilibria.