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In order to find a new method to compare the theory results with experiment results, it is necessary to develop the technique of computer simulating flow visual, which gets flow visual image from the computational flow field data. The computer simulation technique for flow visualization is the technique of CFI. CFI is succinctly defined as the art and science of generating digital images of theoretical fluid observations of real flow fields. It involves numerical value calculation, image processing, computer graph and other techniques. In this paper, we study four kinds of CFI technique. They are CFI-Schlieren, CFI-Shadowgraph, CFI-Interferometry and CFI-Color Schlieren. The algorithms of CFI-Color Schlieren and CFI-Interferometry are amply dissertated and some computational images are provided. Then we have accomplished the laser holographic interferometry experiments of shock wave diffracting double cubes model. We compare experimental interferograms with CFI images. The result verifies the validity of the theory. The comparisons of the computation with experiment are given in this paper. At the same time, we have developed the computer simulation software for flow visualization. The software provides a new approach to test and verify experiment and theory result. This paper also gives a description about the design method and function of the software. In the end, we also discuss the developing direction of the future.
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