The complicated geometrical relations between the disk and the high-lift systems are solved by using chimera grid technique.

The influence of blade thickness and torsion on the flow field at low Reynolds number for rotor in a hover is studied with the Chimera grid technique.

Failing to find details about chimera grid calculation in the open lecture, we researched and developed such details ourselves.

According to the observed field data of hydrology and sediment in Yalu River estuary,mathematical models with multiple nested grids of tidal current and sediment in estuary had been set up by using of MIKE 21 FM module,covering the area from Jiangqiao bridge in Dandong city to 6～7 m isobath.

Based upon the moving grids and embedded grids, a moving embedded grid system is established to consider actual blade flapping and pitching motions.

The embedded grids methodology has been a.

A moving overset grid method with 3D-Euler solver was used to realize the simulation of the separation process.

Also,a strategy which combines mesh deformation based on Delaunay graph mapping and unstructured overset grids is proposed for sim- ulating unsteady flows both wit.

As solution of unsteady flows due to flexible flapping-wings is not possible by mesh deformation and overset grids alone unless grid regeneration is employed,an effective strategy which combines mesh deformation based on Delaunay graph mapping and unstructured overset grids is proposed in this article.

Based on the international advanced model system——the Regional Atmospheric Modeling System (RAMS) and by means of new multi\|layer grid nesting technique, a multi-scale meteorology numerical forecasting model system has been finished, which can make simulation for regional and city\|scale systems synchronized or paralleled.