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根据铝型材挤压流动模型的特点,提出了一种适用于有限体积法铝型材挤压数值模拟系统的六面体网格划分算法。该算法可以依据模型的几何尺寸定义相应的网格尺寸和疏密程度,实现用尽量少的单元捕捉和拟合模型的所有几何特征,保证了网格数量和网格质量的平衡。最终,利用开发的六面体网格划分算法,对方孔铝型材挤压系统模型进行了网格划分,与Hypermesh的网格划分结果相比,网格单元数由88079减少为20126,从而有利于提高数值计算效率。
According to the characteristics of aluminum extrusion flow model, a hexahedron meshing algorithm suitable for the finite volume method of aluminum extrusion numerical simulation system is proposed. The algorithm can define the corresponding grid size and density according to the geometric size of the model, and can capture and fit all the geometric features of the model with as few units as possible to ensure the balance between the number of grids and the grid quality. Finally, using the developed hexahedral meshing algorithm, the model of square hole aluminum extrusion system was meshed. Compared with Hypermesh's meshing result, the number of mesh cells decreased from 88079 to 20126, which is beneficial to improve the numerical value Computational efficiency.