Speaker
Julien Guillod
Description
Co-authors: Dallas Albritton, Mikhail Korobkov, Xiao Ren, and Vladimír Šverák
Abstract: It is well known in physics literature, despite almost no mathematical results, that the steady states of fluid model equations are not unique and appear through bifurcations when the Reynolds number increases. After presenting this, the same methodology will be used for time-dependent problems to obtain the non-uniqueness of solutions to Cauchy problems. Numerical non-uniqueness results will be presented for the Navier-Stokes equations in both two and three dimensions. The physical implications will be discussed in particular.