On Mixed Methods for Biharmonic Problems on Polygonal Domains

ao.Univ.-Prof. Dipl.-Ing. Dr. Walter Zulehner

Jan. 15, 2013, 2:30 p.m. S2 059

For the first and the third boundary value problem of the biharmonic operator, which are interesting model problems in elasticity as well as in fluid mechanics, mixed second-order formulations are presented which are equivalent to the original fourth-order formulation without convexity assumptions on the domain. Based on these results the construction of preconditioners for the corresponding discretized systems is discussed.