Coupled Fluid Dynamic And Poro-Elastic Effects During Gas Flow In Nanoporous Media: Experiments And Multi-Scale Modelling

纳米多孔介质中气体流动过程中的耦合流体动力学和孔隙弹性效应：实验和多尺度建模

• 批准号: 392108477
• 负责人: Professor Dr. Ralf Littke, since 7/2020
• 金额: --
• 依托单位: Department of Engineering Mechanics
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/392108477?language=en
• 关键词: Coupled; Fluid; Dynamic; Poro; Elastic

The project will investigate fluid-dynamic and poro-elastic effects during gas transport in micro-/nanoporous media with special focus on sedimentary rocks. We will use a combined approach, involving laboratory experiments of gas transport on artificial and natural micro-/nanoporous media (RWTH Aachen University) and multiscale modeling of the observed/anticipated effects (Tsinghua University). Both partner groups contribute long-term research experience in their respective fields and have started a successful and fruitful co-operation lately.The joint research is targeting issues of fluid dynamics and poro-elastic deformations in low-permeability rocks, including slip flow, Knudsen diffusion, real gas effects, pressure-dependence of viscosity, stress-dependence of permeability coefficients due to deformation/modification of the transport pore system, and dependence of gas and water sorption/desorption on fluid flow. Permeability coefficients of micro- and nanoporous media are not invariable material properties but, particularly when measured with different gases, are very sensitive to changes in the boundary conditions of fluid flow tests (pressure, pressure gradients, changes in effective stress). Information on the pore system properties can be derived by systematic variation of experimental conditions and the gases used.The proposed research will first elucidate fundamental relationships of gas transport in narrow, deformable pores by using artificial pore systems (nanocapillaries, defined micro-slits in materials with different hardness). Subsequently measurements on selected lithotypes will be conducted and evaluated. An improved understanding of the interplay between pore size-dependent rheologic effects and the mechanical deformation of the pore system will greatly improve predictions of gas flow processes on different scales, thus enabling upscaling from the nm (laboratory) to km-range (field) scale. While many fluid transport-modeling approaches have to rely on published data for validation of their results, in the proposed project the experimental program will be adapted flexibly through direct feedback between modelers and experimentalists. The quality and reproducibility of the experimental results will thus be ensured and the consistency of the interpretations and models verified.

该项目将研究气体在微/纳米多孔介质中传输过程中的流体动力学和孔隙弹性效应，特别关注沉积岩。我们将使用一种综合的方法，包括人工和天然微/纳米多孔介质（RWTH亚琛大学）和观察到的/预期的影响（清华大学）的多尺度建模的气体传输的实验室实验。双方在各自的领域积累了长期的研究经验，最近开始了成功而富有成果的合作。联合研究的目标是低渗透岩石中的流体动力学和孔隙弹性变形问题，包括滑移流，Knudsen扩散，真实的气体效应，粘度的压力依赖性，由于运输孔隙系统的变形/修改导致的渗透系数的应力依赖性，以及气体和水吸附/解吸对流体流动的依赖性。微米和纳米多孔介质的渗透系数不是不变的材料性质，但是，特别是当用不同气体测量时，对流体流动测试的边界条件（压力、压力梯度、有效应力的变化）的变化非常敏感。通过系统地改变实验条件和使用的气体，可以获得有关孔隙系统性质的信息。拟议的研究将首先阐明通过使用人工孔隙系统（纳米帽，在不同硬度的材料中定义的微缝）在狭窄的可变形孔隙中气体输运的基本关系。随后将对选定的岩石类型进行测量和评价。孔径依赖的流变效应和孔隙系统的机械变形之间的相互作用的理解将大大提高不同尺度上的气体流动过程的预测，从而使放大从纳米（实验室）到公里范围（现场）的规模。虽然许多流体输运建模方法必须依赖于已公布的数据来验证其结果，但在拟议的项目中，将通过建模者和实验者之间的直接反馈灵活地调整实验程序。因此，将确保实验结果的质量和可重复性，并验证解释和模型的一致性。

项目成果

Compaction effects on permeability of spherical packing

压实对球形填料渗透性的影响

• DOI: 10.1108/ec-01-2020-0015
• 发表时间: 2020-05
• 期刊: Engineering Computations
• 影响因子: 1.6
• 作者: Duzhou Zhang;Zhiguo Tian;Zhiqiang Chen;Dengyun Wu;Gang Zhou;Shaohua Zhang;Moran Wang
• 通讯作者: Moran Wang

LATTICE BOLTZMANN MODEL FOR UPSCALING OF FLOW IN HETEROGENEOUS POROUS MEDIA BASED ON DARCY'S LAW

基于达西定律的异质多孔介质流动升级的格子玻尔兹曼模型

• DOI: 10.1615/jpormedia.2019023331
• 发表时间: 2019
• 期刊: Journal of Porous Media
• 影响因子: 2.3

Interfacial settling mode and tail dynamics of spherical-particle motion through immiscible fluids interfaces

• DOI: 10.1016/j.ces.2020.116091
• 发表时间: 2021-01
• 期刊: Chemical Engineering Science
• 影响因子: 4.7
• 作者: Zhiqiang Chen;Moran Wang;Shiyi Chen