国防科技大学学报2011，Vol.33Issue(2)：150-156,7.
基于迎风型有限体积法的非结构化网格流场格心数据高质量体绘制方法
High-quality Volume Rendering of Unstructured-grid Cell-centered Data of Flow Fields Based on Upwind FVM
摘要
Abstract
In the field of computational fluid dynamics, the upwind finite volume method (FVM) is widely applied to solve the complicated flows with unstructured grids as the volumetric representation. It produces unstructured-grid cell-centered data at the center of each cell(control volume)with the flow discontinuity constraint on the inner-face between face-adjacencies. For visualization,existing reconstruction approaches violate the discontinuity constraint. As a result, the image has low quality due to the lost information of the discontinuity. This research presented a method to recontruct the discontinuous states at a sample baaed on the dual control volumes on the framework of multi-pass raycasting. It guarantees that the field on the inner-face is discontinuous between face-adjacencis, which is in accord with the solution of the numerical computation. We also designed a synthesizer for the discontinuous segments based on the reconstruction above, so that the discontinuity information can be transferred to rendering data. The experiments demonstrate that our approach can obviously improve the image quality and clearly visualize the features in the flows.关键词
流场可视化/迎风型有限体积法/非结构化网格/格心数据/体绘制Key words
flow visualization/ upwind FVM/unstructured grids/cell-centered data/volume rendering分类
信息技术与安全科学引用本文复制引用
马千里,李思昆,白晓征,曾亮,徐华勋..基于迎风型有限体积法的非结构化网格流场格心数据高质量体绘制方法[J].国防科技大学学报,2011,33(2):150-156,7.基金项目
国家973项目(2009CB723803) （2009CB723803）
国家自然科学基金资助项目(60873120) （60873120）
