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基于映射函数理论提出二维/三维流场的网格生成新方法。针对实际应用中对场函数变密度的要求,提出可控制网格疏密度的插值公式,并以此对典型物体周围流场进行网格剖分,验证其有效性。针对圆形域(柱形域)流场网格生成质量的缺陷,提出在目标域中建立内置块的新策略,统计分析网格最小内角分布,并与原方法对比分析,以验证改进效果。运用自编程序,对具有复杂外形的空间膜结构进行流场网格剖分,并将该网格导入Ansys-CFX软件,进而数值模拟结构表面风压分布。经验证,该方法可有效地运用于流场网格剖分。
A New Method of Mesh Generation Based on Mapping Function Theory for 2D / 3D Flow Field. According to the requirements of variable density of field function in practical application, an interpolation formula that can control the degree of mesh density is proposed, and the flow field around a typical object is meshed to verify its validity. Aiming at the defects of the circular grid (cylindrical domain) flow grid generation quality, a new strategy for building built-in blocks in the target domain is proposed. The minimum internal angle distribution of the grid is statistically analyzed and compared with the original method to verify the improvement effect. The self-programmed program was used to mesh the flow field of the space membrane structure with complex shape. The grid was then imported into Ansys-CFX software to simulate the wind pressure distribution on the structure surface. It has been verified that this method can be effectively applied to flow field meshing.