Research on the Generation of Two-Dimensional Fitted-Body Grid by Adjacent Boundary Nodes Sliding Method

Abstract

. In this paper, the basic theory of Adjacent Boundary Nodes Sliding Method is studied based on C++ and by using ObjectARX as the re-development tool of AutoCAD. During the mesh generation and iteration process, the method of adjusting the orthogonal property between the grid lines and the boundary by using Adjacent Boundary Nodes Sliding Method is elaborated. The orthogonal property of four common structured grids: Laplace, TM, Potential Flow Theory, and WEI Wen-li Method, have been adjusted with this method. Experiment results indicate that the orthogonal property between the grid lines and the boundary is improved obviously by using Adjacent Boundary Nodes Sliding Method to generate two-dimensional body-fitted grids, without changing the original control functions which play a major role in the adaptability of grid lines and physical domain of flow field. A solid base is provided for the subsequent Computational Fluid Dynamics (CFD) calculation.