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| Numerical simulation of 3D lib-driven cavity flow based on AMG method and multiblock non-orthogonal grid |
| 1.Institute of Rheological Mechanics and Material Engineering, Central South University of Forestry and Technology, Changsha, Hunan 410004, China; 2.School of Mathematics and Computational Science, Xiangtan University, Xiangtan, Hunan 411105, China) |
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Abstract To apply AMG method in fast solving FVMbased discrete systems of NavierStokes equations, the non-orthogonal hexahedron collocated grid system was set up to numerically simulate lib-driven flow in vertical and 45° inclined wall cavity. Based on the SIMPLE algorithm of non-orthogonal hexahedron collocated grid, the structure and the compressed sparse row(CSR) storage scheme of coefficient matrix were obtained by N-S equation and multi-block grid. Numerical simulation programs were designed to solve the flow parameters of governing equations by AMG method. Compared computing results with existing results, the flow structure figures of 3D lib-driven cavity flow were obtained, and the algorithm was verified. The results show that AMG and the related algorithms can be applied in the numerical simulations of fluid flow in complex field, and are suitable for large scale numerical simulation of fluid flow.
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2012, Vol. 33 
