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[22020-25-03] Thread-Parallel Computations of 3D Incompressible Flow with QSI Scheme and Multigrid Preconditioned Pressure Solver (Proceedings of Symposium on Applied Mechanics)
Keywords:Incompressible Fluid Computation, Preconditioning Method, Pressure Poisson Equation, Bi-CGSTAB Method, SOR Method, Multigrid Method, QSI Scheme, TVD Scheme, Thread-Parallel Computation, 3D Cavity Flow
To obtain accurate numerical results of fluid flows, it is important to apply high-order schemes to the convection terms. While it was shown that QSI scheme is more accurate than 5th-oder TVD, it is time-consuming due to its flux-control procedures.
In this paper, QSI scheme is used for the incompressible 3D cavity flow in addition that the pressure Poisson equations are solved with Bi-CGSTAB method without preconditioner and with SOR or multigrid preconditioners.
As a result of thread-parallel computations, it was shown that multigrid preconditioner is effective to decrease the total elapsed time even if QSI scheme is employed.
In this paper, QSI scheme is used for the incompressible 3D cavity flow in addition that the pressure Poisson equations are solved with Bi-CGSTAB method without preconditioner and with SOR or multigrid preconditioners.
As a result of thread-parallel computations, it was shown that multigrid preconditioner is effective to decrease the total elapsed time even if QSI scheme is employed.