Abstract: To address the generation problem of surface streamline on complex geometry in large-scale vector field, we design and implement a high-precision visual analysis method of complex geometric surface streamline. This method first performs the intersection calculation based on the complex topological two-dimensional surface structure, and introduces a high-precision interpolation algorithm to achieve effective vector extraction of the geometric surface. Then, an improved Runge-Kutta streamline integration extension technology for vector field is applied for integration calculation, where the adaptive integration step strategy and streamline-surface intersection acceleration structure is introduced, in order to generate continuous and consistent surface streamline. Finally, this method adds the ball feature to the visualization pipeline process, and is integrated into the general visualization analysis platform. Experimental results show that the method can generate continuous and consistent geometric surface streamlines with high precision, and effectively characterize the physical characteristics of the surface flow field of complex devices.

Key words: vector extraction, streamline integration extension technology, adaptive integration step, streamline-surface intersection acceleration structure