Abstract
The paper analyses the implantation of three of the most performant preconditioned generalized conjugate gradient (PGCG) methods in the defect - correction (DC) iteration. The test problems are the Navier-Stokes equations which describe the incompressible, axisymmetric steady flow past a circular cylinder and past a sphere. The PGCG methods, being linear solvers a Newton process must be used in the DC iteration. The necessary number of Newton steps in a DC step is analysed. The preconditioner used is based on the ILU of the Jacobi matrix. The quantities which monitored the computational behaviour are the average reduction factor (ρ) and the efficiency (τ). The computational results are compared with those provided by the multigrid (MG) - DC method.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
