Uncertainty quantification for multiscale kinetic equations with uncertain coefficients
[Math. Dept.]
November 14, 2018 10:00-11:00
W303 School of Mathematics
SPEAKER
Shi Jin (University of Wisconsin-Madison)
ABSTRACT
In this talk we will study the generalized polynomial chaos-stochastic Galerkin (gPC-SG) approach to kinetic equations with Uncertain coefficients/inputs, and multiple time or space scales, andshow that they can be made asymptotic-preserving, in the sense that the gPC-SG scheme preserves various asymptotic limits in the discrete space.
This allows the implementationof the gPC methods for these problems without numerically resolving (spatially, temporally or by gPC modes) the small scales. Rigorous analysis, based on hypocoercivity of the collision operator, will be provided for general kinetic equations to prove uniform convergence toward the local or global equilibrium, and the spectral convergence of the gPC-SG method.
SUPPORTED BY
School of Mathematics, Sichuan University