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：我们开发了一种新方法，包含多种可视化手段，用于多孔介质中驱替过程的比较性时空分析。旨在分析并比较实验中的集合数据集，以深入了解不同参数对流体流动的影响。为捕捉驱替流体（invading fluid）对防御流体（defending fluid）的置换过程，我们首先将输入图像序列压缩为单一时序图。基于此图，生成覆盖整个过程的时空流图（spatio-temporal flow graph）。该图进一步简化，仅反映驱替流体运动中的拓扑变化。我们的交互式工具通过可视化图结构、实验设置背景以及提供多指标图表，支持对这些过程的视觉分析。我们与领域专家合作，应用该方法分析并比较流体性质或多孔介质固体结构发生变化的集合数据集。最后，报告了专家们获得的洞见，并讨论了本方法的优势、通用性与局限性。