A New Method for Overlapping Grids Connectivity in Numerical PDE with Complicated Geometry

摘要

A different approach to structured grid connectivity in overset method is discussed and several related concepts introduced. It is based on a cell selection process instead of the traditional hole cutting as an essential ingredient. Hole cutting is a byproduct of this process and the holes that arise are both automatically optimum and not affected by any imperfection on the wall surface. This approach does not require any kind of tree data structure to expedite the donor search process. It can also be regarded as a generalized method of cutting holes around both flow refinement and walls indiscriminately. Its greatest strength is the simplicity of the concept and implementation which results in a very natural and compact algorithm.