含粗织构夹杂的多孔介质中空气捕集的实验与数值分析

IF 2 4区地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS

Acta Geophysica Pub Date : 2016-12-28 DOI:10.1515/acgeo-2016-0095

Paulina Szymańska, Witold Tisler, C. Schütz, A. Szymkiewicz, I. Neuweiler, R. Helmig

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引用次数: 5

摘要

本文在细砂为背景、粗砂为包裹体的模型多孔介质上进行了二维向上入渗实验。本实验的目的是研究在渗透过程中由于材料结构不均匀而发生的结构空气捕获的影响。实验表明，大量的空气被困在每个包裹体中。采用水-气两相流动模型和Richards方程进行了数值模拟。仅使用两相流模型即可较好地再现实验结果，该模型同时考虑了结构和孔隙尺度的捕获。另一方面，理查兹方程不能表征由材料非均质性引起的结构俘获。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Experimental and Numerical Analysis of Air Trapping in a Porous Medium with Coarse Textured Inclusions

The paper presents a 2D upward infiltration experiment performed on a model porous medium consisting of fine sand background with two inclusions made of coarser sands. The purpose of the experiment was to investigate the effects of structural air trapping, which occurs during infiltration as a result of heterogeneous material structure. The experiment shows that a significant amount of air becomes trapped in each of the inclusions. Numerical simulations were carried out using the two-phase water-air flow model and the Richards equation. The experimental results can be reproduced with good accuracy only using a two-phase flow model, which accounts for both structural and pore-scale trapping. On the other hand, the Richards equation was not able to represent the structural trapping caused by material heterogeneity.

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来源期刊

Acta Geophysica 地学-地球化学与地球物理

CiteScore

3.90

自引率

13.00%

发文量

251

审稿时长

5.3 months

期刊介绍： Acta Geophysica is open to all kinds of manuscripts including research and review articles, short communications, comments to published papers, letters to the Editor as well as book reviews. Some of the issues are fully devoted to particular topics; we do encourage proposals for such topical issues. We accept submissions from scientists world-wide, offering high scientific and editorial standard and comprehensive treatment of the discussed topics.