Abstract:
Some key information about the Structured Grid Deformation Program (SGDP V1.0), including method, components, features, operation procedure, examples and applications, were briefly introduced in this paper. SGDP V1.0 is the first modular program of the grid deformation module, one of the share libraries of the National Numerical Windtunnel (NNW) project. And it was developed on the basis of the old research code through several kinds of software engineering technologies, such as code reconstruction, interface specification and function extension. In the SGDP V1.0, the RBF-TFI method is used to update the coordinates of the deformed grid nodes. Now SGDP V1.0 can generate the deformed grid of four types of motions with the use of a modular code structure and flat parameter input. In the performance test, the CPU time cost of reading, writing and updating one million grid nodes were about 0.01, 0.008 and 0.1 seconds respectively. And a grid with tens of million nodes could be updated in several seconds, which showed extremely high efficiency. Finally, the SGDP V1.0 was used to some grid deformation examples and flow simulation cases. The results demonstrate that the program has good abilities to deal with the deformation of complex-topology grid and keep the cell quality. So more accurate numerical simulation data can be obtained with the use of SGDP V1.0.