Research And Application Of Streamline Visualization Technology

With the development of hydromechanics,science computation visualization, computer graphics,three-dimensional game on the network and so on,the visualization technology obtained the widespread application.The streamline visualization technology is one of the vector field visualization technologies,mainly includes streamline computation and streamline demonstration.It's similar to the fluid experiment technology,so the streamline visualization technology is used generally in the Computational Fluid Dynamics visualization.The research on streamline visualization technology already became a very active topic in this domain.But the speed of the construction of streamline is relatively slow at present,the realistic effect of the streamline drawing is desired.This article do deep research from two aspects,one is the streamline computation and the other is streamline drawing.The purpose is able to develop a graphics software which can construct the streamline model fast and demonstrate the three-dimensional model more realisticly.To solve the exists problem in present streamline visualization technology.In order to achieve this goal,this article has mainly done the following research work:First,to speed up the streamline model constuction,this article has designed a new seed spot generator method that the seed spot plane's shape is consistent with the section shape,and applies this method on data organization of streamline computation.Improvement was made to the numerical integration's method in streamline computation,and the thought of chosing integral method according to Reynolds number was proposed.Due to the index search's thought,in the streamline computation a new method that searches point localization layeredly was proposed.Second,in enhancing the reality of the three-dimensional model demonstration,this article has designed a new kind of streamline geometry primitive structure,Streamline Arrow.According to this structure,this article designed the multivariable mapping algorithm and achieved to describe an image by multivariable.This article succeded to carry on the test to the speed of the streamline construction and the effect of streamline drawing on the software platform of the three-dimensional model visulization designed.The result indicated that the streamline computational method proposed in this article may reduce the computation load of streamline construction,enhance the speed of the streamline's construction,and the streamline drawing method proposed can describe the structure and the characteristic of the three-dimensional model dearly.