Masakazu Inaba

Node-based parallel computing of three-dimensional incompressible flows using the free mesh method

The present report discusses node-based parallel computing of three-dimensional incompressible flows using a node-based finite element method named the free mesh method (FMM). The FMM has two advantages over the finite element method. One advantage of the FMM is that this method is quite suitable for massively parallel computing because all computational procedures, from the mesh generation to the solution of a system of equations, can be performed in parallel in terms of nodes. Another advantage of the FMM is that finite element mesh is not required as input data so that the analyst need only prepare data concerning the nodes in the analysis domain. The present method is implemented on distributed memory systems, such as a parallel supercomputer Hitachi SR8000. The performance of the proposed method is demonstrated by computing a lid-driven cavity problem. A numerical example is used to show that the FMM can achieve high parallel performance by a simple distribution operation of computational loads among multiprocessors.

3D Animation for Free Mesh Method

In recent years, the performance of computer has been improved dramatically. Numerical or computation technology is also developing greatly with the above improvement in the performance of computer. On the other hand, the objects for the analysis become more and more complicated. To deal with the large-scale and complex problems, new approach called the meshless method has been actively studied. The Free Mesh Method is one of the meshless methods, which can solve the complicated phenomenon that the body is dynamically fragmented. In order to animate such an analysis result, this paper describes the 3D animation system for the free mesh method, which is intended to be a post-processor for dynamic phenomena.