Collaborative Research: 4D Visualization and Modeling of Two-Phase Flow and Deformation in Porous Media beyond the Realm of Creeping Flow

合作研究：蠕动流领域之外的多孔介质中两相流和变形的 4D 可视化和建模

• 批准号: 2326113
• 负责人: Pejman Tahmasebi
• 金额: $ 22.73万
• 依托单位: Colorado School of Mines
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-01-01 至 2025-03-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2326113&HistoricalAwards=false
• 关键词: Collaborative; Research; 4D; Visualization; Modeling

Porous media (e.g., sponge, paper, fabrics, rock, and soil) are materials with pores distributed in a solid matrix. When pores are connected, fluids can flow through them. Understanding and predicting fluid flow in porous media is important as it occurs in a wide range of applications, from contamination of groundwater and soil to printing on paper and fabrics. By understanding flow pathways, we can make accurate predictions of the fluid flow, which in turn, will help us design and control related processes. However, predicting fluid flow in porous media is still a long-standing problem. While observing fluid flow in simple two-dimensional porous media can be straightforward, the same is not true in more realistic three-dimensional cases. This proposal aims to carry out an integrated computational and experimental study to provide a more accurate description of flow pathways and realistic fluid flow and the resultant deformations in such materials. Although non-destructive 3D imaging has provided much information about fluid distribution in porous materials, fast and cost-effective 4D pore-scale visualization (i.e., over a period of time) is still very difficult, costly and time-consuming. Furthermore, although visualization of multiphase flow in porous media has been extensively studied in 2D models, there have been very few of such studies in 4D (or even 3D). One goal of this proposal is to develop a 4D method for visualization of two-phase flow in transparent porous media and the deformation that it induces in the media beyond the realm of creeping flow, i.e. when the flow is very slow. This goal will be achieved by collecting 2D images from various angles, which will then be used with a computational algorithm to build a highly detailed 4D image of the multiphase flow. Detailed computations will be carried out in which the two-phase fluid flow and the resulting deformation will be simulated in the same porous media beyond creeping flow. The investigators will also study and identify the critical Reynolds number (Re) at which the transition from the Darcy regime to Forchheimer and eventually turbulent flows occurs. The effect of wettability on the deformation of porous media during two-phase flow will also be investigated. Distinct deformation modes of a porous medium will also be examined under a wide range of Reynolds number and wettability conditions.This project is jointly funded by the Fluid Dynamics program and the Established Program to Stimulate Competitive Research (EPSCoR).This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

多孔介质（例如海绵、纸张、织物、岩石和土壤）是在固体基质中分布有孔隙的材料。当孔隙连通时，流体可以流过它们。了解和预测多孔介质中的流体流动非常重要，因为它发生在从地下水和土壤污染到纸张和织物上的印刷等广泛应用中。通过了解流动路径，我们可以准确预测流体流动，从而帮助我们设计和控制相关过程。然而，预测多孔介质中的流体流动仍然是一个长期存在的问题。虽然观察简单二维多孔介质中的流体流动可能很简单，但在更现实的三维情况下却并非如此。该提案旨在进行综合计算和实验研究，以更准确地描述流动路径和实际流体流动以及此类材料中产生的变形。 尽管无损 3D 成像提供了有关多孔材料中流体分布的大量信息，但快速且经济高效的 4D 孔隙尺度可视化（即在一段时间内）仍然非常困难、成本高昂且耗时。此外，尽管多孔介质中多相流的可视化已在 2D 模型中得到广泛研究，但在 4D（甚至 3D）模型中的此类研究却很少。该提案的一个目标是开发一种 4D 方法，用于可视化透明多孔介质中的两相流以及它在蠕动流领域之外（即当流动非常缓慢时）在介质中引起的变形。这一目标将通过从不同角度收集 2D 图像来实现，然后将这些图像与计算算法一起使用来构建多相流的高度详细的 4D 图像。将进行详细的计算，其中将在蠕动流之外的相同多孔介质中模拟两相流体流动和由此产生的变形。研究人员还将研究并确定从达西流态过渡到福希海默流态并最终发生湍流的临界雷诺数 (Re)。还将研究两相流过程中润湿性对多孔介质变形的影响。多孔介质的不同变形模式还将在广泛的雷诺数和润湿性条件下进行检查。该项目由流体动力学计划和刺激竞争性研究既定计划 (EPSCoR) 共同资助。该奖项反映了 NSF 的法定使命通过使用基金会的智力价值和更广泛的影响审查标准进行评估，并被认为值得支持。