边界面法数值结果的云图表征

摘要

The newly developed boundary face method comes into the advantage of the conventional Boundary Element Method, and the boundary faces of the geometry are discretized by patches in parametric space. These constitute advantages over standard mesh-based methods in some special areas such as moving boundaries, large deformation simulation, high gradient problems etc. But they make post-processing of the numerical results an issue which needs additional effort. In this paper, on the basis of the corresponding color of the nodes' numerical values of each background triangle with advancing front technique, a filling method for Nephogram characterization of boundary face method's numerical results is presented and realized by means of OpenGL. It is demonstrated that the proposed approach is feasible and efficient.%边界面法继承了传统边界元法的优点,并将几何实体的边界曲面离散为参数空间里的曲面单元,在处理一些特殊问题如移动边界、高梯度、大变形等方面显示出特殊的优越性.但是也使得计算结果的后处理遇到困难.提出了一种基于黎曼度量推进波前法生成三角背景网格的实用边界面法计算结果后处理方法.该法对求解域剖分成三角背景网格然后将计算结果映射到网格节点上,通过区域填充获得计算结果的云图.温度场的数值算例表明该方法可靠实用.