• Aucun résultat trouvé

A perturbed two-level preconditioner for the solution of three-dimensional heterogeneous Helmholtz problems with applications to geophysics

N/A
N/A
Protected

Academic year: 2021

Partager "A perturbed two-level preconditioner for the solution of three-dimensional heterogeneous Helmholtz problems with applications to geophysics"

Copied!
134
0
0

Texte intégral

Loading

Figure

Figure 2.1: Histories of convergence for the convection-di ffusion problem of FGMRES (5) preconditioned by full GMRES (m inner ) for different values of m inner .
Figure 2.3: Histories of convergence for the FIDAP-ex11 matrix of FGMRES (5) preconditioned by a diagonal preconditioned full GMRES (m inner ) for di fferent values of m inner .
Table 2.6: Number of iterations (It) and operation ratio (r ops ) for the 127 2 -Poisson problem for p canonical basis right-hand sides.
Figure 2.5: Histories of convergence of block methods when solving the Poisson problem with p = 5 canonical right-hand sides (Table 2.6)
+7

Références

Documents relatifs

Schwarz preconditioning combined with GMRES, Newton basis and deflation DGMRES: preconditioning deflation AGMRES: augmented subspace. 11

Moreover, from our analysis of an isotropic model problem, it is established that for nested factorization preconditioned matrix, the order of condition number is at least O(h − 1

Scaffold-based systems are manmade microenvironments that can host cells whether they are (C) solid scaffolds that offer a rigid matrix and allow spheroid formation or (D)

scales and the distance to the threshold. The derivation of amplitude equations at orders higher than 83/2 starting with the Boussinesq equations is very painful and it

Assume that n nodes, each capable of sensing events within a radius of r, are randomly and uniformly distributed in a 3-dimensional region R of volume V , how large must the

In this article, a method to accelerate the solution of multiple right-hand side problems when using the adaptive multi-preconditioned finite element tearing and

Although it is based on an Eulerian description of deformation and flow, the code, which we named DOUAR (‘Earth’ in Breton language), has the ability to track interfaces and,

Figure 4.6 : Comparaison des déplacements horizontal (S h ) et vertical (S v ) du sol en condition de terrain vierge et ceux en condition avec présence de la tranchée sans