TY - JOUR
T1 - Numerical Studies of a Class of Composite Preconditioners
AU - Qiang Niu & Michael Ng
JO - Journal of Computational Mathematics
VL - 2
SP - 136
EP - 151
PY - 2014
DA - 2014/04
SN - 32
DO - http://doi.org/10.4208/jcm.1401-m4145
UR - https://global-sci.org/intro/article_detail/jcm/9874.html
KW - Preconditioner, ILU, Tangential frequency filtering decomposition, GMRES.
AB - <p style="text-align: justify;">In this paper, we study a composite preconditioner that combines the modified tangential frequency filtering decomposition with the ILU(0) factorization. Spectral property of the composite preconditioner is examined by the approach of Fourier analysis. We illustrate that condition number of the preconditioned matrix by the composite preconditioner is asymptotically bounded by $\mathcal{O}$($h^{-\frac23}_p$) on a standard model problem. Performance of the composite preconditioner is compared with other preconditioners on several problems arising from the discretization of PDEs with discontinuous coefficients. Numerical results show that performance of the proposed composite preconditioner is superior to other relative preconditioners.</p>