Parallel Block Multigrid Preconditioner for 3D Navier-Stokes Equations on Unstructured Grids
In this paper, we explore a parallel block multigrid preconditioner based on factorization of the coefficient matrix generated in three-dimensional unstructured grids system. This preconditioner is robust with respect to the magnitude of the mesh size and the coefficient complexity, apply smoothed aggregation algebraic multigrid which using block lower-upper symmetric Gauss-Seidel(BLU-SGS) as smoother to accelerate convergent rate. We focus on this method to three-dimensional, unstructured, large-scale, parallel and NS equations steady-state simulations. The numerical results which conducted on NACA0012 airfoil indicate that nearly optimal convergence rates and computational complexity for parallel solutions, this method also provide high speedup and efficiency for a series of processors.
parallel multigrid preconditioner block LU-SGS unstructured grids NS equations.
Zongzhe Li Lu Yao Wei Cao Yongxian Wang Zhenghua Wang
Parallel and Distributed Processing for National Laboratory, School of Computer Science, National University of Defence Technology Changsha, Hunan 410073, P.R.China
国际会议
太原
英文
150-154
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）