Research On Local Remeshing Technology Based On Delaunay Grid Method

This paper focuses on dynamic grid method aim at the for moving boundary problems ofmany-body separation, proposed a new set of local mesh reconstruction method. First, to research theDELAUNAY grid gene-ration method, it apply DELAUNAY triangulation method and automaticalpoint distribution technology based on the distribution of the boundary grid to generated unstructuredgrid, and apply the repair technology to repair the border without additional point insertion, and gridgenerated of some wing verticify the method efficient and feasible. Then, to study the dynamic gridmethod, the application of spring approximation move the grid points, proposed the method of acombination of a volume-based detection and hierarchical thinking to determine local reconstructionarea, and apply DELAUNAY method to regenerationg of the grid structure in the region, and thenthrough the wing-pylon-store system analysis mesh generation process, verify the feasibility of themethod. Furthermore, the establishment consider changes of grid in the unsteady Euler equations, applyfinite volume method to discrete it, given a discrete algorithms based on vertex schenm. Finally, theapplication of the proposed moving mesh methods and the joint solution of the six degrees of freedomexternal stores with the unsteady Euler equations simulate wing/pylon/store separation system to verifythe accuracy of this method and viability.