Diff. Geom, Math. Phys., PDE Seminar: Anna Mazzucato

  • Date: 04/02/2019
  • Time: 12:30
Lecturer(s):
Anna Mazzucato. Penn State
Location: 

University of British Columbia

Topic: 

On the vanishing viscosity limit for incompressible flows

Description: 

I will discuss recent results on the  analysis of the vanishing viscosity limit, that is, whether solutions of the Navier-Stokes equations converge to solutions of the Euler equations, for incompressible fluids when walls are present. At small viscosity, a viscous boundary layer arise near the walls where large gradients of velocity and vorticity  may form and propagate in the bulk (if the boundary layer separates). A rigorous justification of Prandtl approximation, in absence of analyticity or monotonicity of the data, is available essentially only in the linear or weakly linear regime under no-slip boundary conditions.  I will present in particular a result on concentration of vorticity at the boundary for symmetric flows and the justification of Prandtl approximation for an Oseen-type equation (linearization around a steady Euler flow) in general smooth domains, quantifying the effect of curvature on the pressure correction.

Other Information: 

Location: MATH 126