Because much computing time is required for the refined turbulence simulations, it is imperative to develop efficient acceleration methods. An improved mode multigrid method is proposed to accelerate the convergence of turbulent flow in this paper. It is found that the zero-frequency shift modes, which are characterized as the boundary layer and the wake of turbulent flows, represent the main modes of turbulent flows, and retaining the shift modes can make the turbulence flow converge faster. Numerical experiments indicate that the improved mode multigrid method can eliminate the problem of irregular residual jump shown in the original mode multigrid method and can be successfully applied to accelerate the turbulent flows to steady state. The improved method is more robust and more efficient compared with the original mode multigrid method. The number of iteration steps can be significantly reduced by 2–3 times than the nonacceleration method while maintaining the computational accuracy. The improved mode multigrid method is further extended to accelerate the convergence of various turbulent flows for complex configurations, which demonstrates that the method can be widely used in engineering problems.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Improved Mode Multigrid Method for Accelerating Turbulence Flows


    Contributors:
    Tan, Shenglian (author) / Liu, Yilang (author) / Kou, Jiaqing (author) / Zhang, Weiwei (author)

    Published in:

    AIAA Journal ; 59 , 8 ; 3012-3024


    Publication date :

    2021-08-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





    Accelerating Shock Detection Using a Multigrid Approach

    Blumhoefer, Hannah / Sharma, Anupam | AIAA | 2025


    Multigrid diagonalized-ADI method for compressible flows

    Sung, Chun-ho / Park, Soo-Hyung / Kwon, Jang | AIAA | 2001


    Multigrid Techniques for Hypersonic Viscous Flows

    F. Grasso / M. Marini | AIAA | 1993


    Agglomeration multigrid for viscous turbulent flows

    Mavriplis, D. / Venkatakrishnan, V. | AIAA | 1994