一种四面体网格局部自适应方法在有限元中的应用

通过提出一种针对三维四面体网格的区域整形技术，给出了一种简便实用的四面体网格局部自适应加密方法，并将其与流量修正有限元法结合，应用于三维高速流的计算

A LOCAL ADAPTIVE GRID REFINEMENT METHOD OF TETRAHEDRON ELEMENT AND ITS APPLICATION TO THE FINITE ELEMENT METHOD

A local refinement method of three dimensional tetrahedron elements is presented in this paper. It is the extension of Lo ¨hner's mesh enrichment method for two dimensional triangular grid. Three steps are included in the whole process. First, a certain number of elements which need enrichment is defined according to the remeshing parameters. Those elements are called initial enrichment elements, which will be subdivided into eight small tetrahedra by introducing the midpoints of each side as new verte...