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Regularity in time along the coarse scale flow for the incompressible Euler equations
Special Events| Speaker: | Philip Isett, MIT |
| Related Webpage: | http://math.mit.edu/directory/profile.php?pid=1546 |
| Location: | 1147 MSB |
| Start time: | Mon, Jan 11 2016, 3:10PM |
Description
A remarkable feature of known, nonstationary solutions to incompressible
Euler is the phenomenon that fine scale velocity fluctuations are
carried along the coarse scale flow of the solution. We will discuss
how this phenomenon is captured in the proofs of several time regularity
results that hold for incompressible Euler flows (possibly with low
regularity). Among these results are a proof of the smoothness of
trajectories in a regime just below the threshold for well-posedness,
and improved time regularity results for the pressure and kinetic energy
profile. We will also discuss a strengthening of Onsager’s conjecture
proposed in the work, which offers an explanation as to why the failure
of anomalous dissipation for Euler flows with spatial regularity less
than 1/3 should be generic.
A reception will be help in honor of the speaker right after the talk.