We developed a new approach comprised of different visualizations for the comparative spatio-temporal analysis of displacement processes in porous media. We aim to analyze and compare ensemble datasets from experiments to gain insight into the influence of different parameters on fluid flow. To capture the displacement of a defending fluid by an invading fluid, we first condense an input image series to a single time map. From this map, we generate a spatio-temporal flow graph covering the whole process. This graph is further simplified to only reflect topological changes in the movement of the invading fluid. Our interactive tools allow the visual analysis of these processes by visualizing the graph structure and the context of the experimental setup, as well as by providing charts for multiple metrics. We apply our approach to analyze and compare ensemble datasets jointly with domain experts, where we vary either fluid properties or the solid structure of the porous medium. We finally report the generated insights from the domain experts and discuss our contribution's advantages, generality, and limitations.

翻译：我们提出了一种由不同可视化技术组成的新方法，用于多孔介质中驱替过程的时空对比分析。旨在分析并对比实验得到的集合数据集，以深入理解不同参数对流体流动的影响。为捕获驱替流体驱替被驱替流体的过程，我们首先将输入图像序列压缩为单张时间图，并由此生成覆盖整个过程的时空流图。该图进一步简化为仅反映驱替流体运动中的拓扑变化。通过可视化图结构、实验装置背景以及提供多指标图表，我们的交互式工具实现了对这些过程的视觉分析。我们与领域专家协作，运用该方法分析并对比了改变流体特性或多孔介质固体结构的集合数据集。最终报告了领域专家获得的洞见，并讨论了本方法的优势、通用性及局限性。