ACCELERATION OF GMRES CONVERGENCE FOR SOME CFD PROBLEMS: preconditioning and stabilization techniques

نویسندگان

  • Azzeddine Soulaimani
  • Nizar Ben Salah
  • Yousef Saad
چکیده

Large CFD problems are often solved using iterative methods. Preconditioning is mandatory to accelerate the convergence of iterative methods. This paper presents new results using several preconditioning techniques. These preconditoners are non-standard in the CFD community. Several numerical tests were carried out for solving three-dimensional incompressible, compressible and magneto-hydrodynamic (MHD) problems. A selection of numerical results is presented showing in particular that the Flexible GMRES algorithm preconditioned with ILUT factorization provides a very robust iterative solver.

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تاریخ انتشار 2000