Inexact IETI-DP for conforming isogeometric multi-patch discretizations

10/12/2021
by   Rainer Schneckenleitner, et al.
0

In this paper, we investigate Dual-Primal Isogeometric Tearing and Interconnecting (IETI-DP) methods for conforming Galerkin discretizations on multi-patch computational domains with inexact subdomain solvers. Recently, the authors have proven a condition number estimate for a IETI-DP method using sparse LU factorizations for the subdomain problems that is explicit, among other parameters, in the grid size and the spline degree. In the present paper, we replace the sparse LU factorizations by fast diagonalization based preconditioners to get a faster IETI-DP method while maintaining the same explicit condition number bound.

READ FULL TEXT

Please sign up or login with your details

Forgot password? Click here to reset