| Based on unstructured mesh, a sort of difference scheme is adopted to solve a series of flow field in this paper. This scheme not only can improve the capability of deal with complex problem, but also can persist the conservation characteristic. Different systems of mesh are employed to simulate the flow field of driving cavity, bend pipe and flow around cylinder. The paper contrast the simulations of different mesh in same model and make a conclusion. We believe that the angle between flow direction and wall is larger, the triangular unstructured mesh is more appropriate. If the flow direction is parallel to wall, the quadrangular structured mesh is right.This paper introduces the method of application about Fluent code. It can be used not only for engineering design, but also for scientific research. General purpose of CFD codes belong to a kind of accumulation of knowledge in researching fluid mechanics and precious wealth left behind by forerunners, which should be cherished and sufficient exploited. |
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