Generation of three-dimension structured grid of hydraulic machine by IGG;

The thesis studies multifarious methods of structured and unstructured grid generation, and empolders their software procedure,and tests those procedures’dependability by examples.

The eccentric annular duct can be mapped into the orthogonal structured meshes by using coordinate trans-formation.

Among the methods of meshing,structured mesh can create rational dimension and good form meshes which are easily adapted and refined.

Currently, the direct current resistivity models are simulated by the typical or one-time finite-element method (TFEM or OFEM), which often associated with the structured mesh such as hexahedron or pentahedral in 3D or with simple unstructured by directly dividing unstructured mesh in 3D or 2D.

In this paper,the velocity and energy governing equations that are similar to the heat conduction equation are solved by using the unstructured grids in several duct geometries and thermal boundary conditions.

Based on the ideas of Discontinuous Galerkin method proposed by Cockburn and Shu,a two-dimensional Discontinuous Galerkin method is implemented on structured grids.