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(二) 剖分单元与插值本节将讨论平面区域的几何剖分和相应的分片插值方法。对求解区域进行剖分为单元时,基本单元可以取为三角形,矩形,四边形等等,如图2—1是将区域Ω部分为三角形,矩形和四边形,每一个这样的三角形,矩形,四边形称之为单元。单元的每一顶点称之为节点。在每个单元上进行插值,插值函数可以取为一次(线性)或高次多项式等等。其中以三角形剖分和相应三角形三
(B) split unit and interpolation This section will discuss the planar area of the geometric subdivision and the corresponding slice interpolation method. When the solution area is divided into units, the basic units can be triangles, rectangles, quadrangles, etc. As shown in Figure 2-1, the area Ω is a triangle, a rectangle and a quadrangle. Each such triangle, rectangle and quadrangle The unit. Each vertex of a cell is called a node. Interpolation is performed on each element, and the interpolation function can be taken as a linear (linear) or higher degree polynomial. Triangulation which triangles and the corresponding triangle III