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Optimization of tetrahedral mesh based on error function
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Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang, Jiangsu 212013, China) |
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Abstract With the development of mesh technique, mesh optimization becomes more and more important. Several usual mesh optimization methods were briefly reviewed. According to the study of used measurement for tetrahedral element quality,an error function was introduced. The mesh was optimized based on the error function.The error function was adopted as the composite function of the optimizationbased smoothing. The smoothing can be calculated by minimizing the error function using Broyden Fletcher Goldfarb Shanno(BFGS) method. The poorquality elements generated by the mesh generation algorithms of advancing front technique (AFT) and Delaunay Triangulation were eliminated combining the optimizationbased smoothing topology optimization. The point collapsing and swapping technology was selected to the topology optimization. The practical application of the optimization algorithm for a impeller of a double channel pump shows that the worst mesh elements can be eliminated and the whole mesh quality can be improved markedly.
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