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DOI | 10.1029/2019WR025044 |
Characterization of the Pore Structure of Porous Media Using non-Newtonian Fluids | |
Hauswirth, Scott C.1; Abou Najm, Majdi R.2; Miller, Cass T.3 | |
2019-08-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
卷号 | 55期号:8页码:7182-7195 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | We demonstrate a simple, cheap method for pore size characterization of porous media that generates a distribution of pore radii for improved flow and transport modeling. The new method for pore structure characterization utilizes recent theoretical developments in non-Newtonian fluids. Numerical evaluations and validations with synthetic porous media showed potential for obtaining a distribution of effective pore radii and their contribution to total flow only by complementing water with non-Newtonian fluids in saturated infiltration experiments. To demonstrate this ability on real sands, a series of one-dimensional column experiments was conducted with varying porous medium packings, including Accusands and a polydisperse sand/glass bead mixture. For each packing, distilled water and varying concentrations of guar and xanthan gum were injected over a range of flow rates and pressure gradients. The model-generated pore radii were compared with pore radius distributions measured by X-ray microcomputed tomography (mu CT), with results demonstrating good agreement between the model and mu CT data. Simulations of saturated water flow and drainage curves using model-generated pore radii compared favorably to experimental data, with errors typically between 2% and 10% for single-phase flow and approaching the error of the mu CT measured radius distributions for the drainage curves. Plain Language Summary Knowledge of pore sizes of porous materials is critical to modeling water flow in the environment. Most pore size measurement methods are expensive and require collecting samples of a limited size for laboratory analysis, thus possibly disturbing the pore structure. Our method shows promise as a simple, cheap approach to measure pore sizes directly in the field. The method involves flowing food-grade fluids that exhibit specific flow properties (non-Newtonian fluids) through soils and using the results as input for the model that provides a pore size distribution. We tested the method on four sands, conducting flow experiments with water and six different non-Newtonian fluids. Model results showed good agreement with direct X-ray measurements of the sands. We also used the pore sizes produced by the model to calculate the flow of water through the sands and compared these results with experimental data. We obtained excellent agreement, with errors on the order of 2-10% for water flow and approaching the error obtained using the X-ray results for the drainage of the material. These results indicate that this simple method provides results nearly as accurate as much more expensive and invasive methods and shows promise for use in the field. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000490973700047 |
WOS关键词 | RELATIVE PERMEABILITY ; CAPILLARY-PRESSURE ; SIZE DISTRIBUTION ; FLOW ; TRANSPORT ; SCALE ; POROSIMETRY ; WATER ; MODEL |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/185887 |
专题 | 资源环境科学 |
作者单位 | 1.Calif State Univ Northridge, Dept Geol Sci, Northridge, CA 91330 USA; 2.Univ Calif Davis, Dept Land Air & Water Resources, Davis, CA 95616 USA; 3.Univ N Carolina, Dept Environm Sci & Engn, Chapel Hill, NC 27515 USA |
推荐引用方式 GB/T 7714 | Hauswirth, Scott C.,Abou Najm, Majdi R.,Miller, Cass T.. Characterization of the Pore Structure of Porous Media Using non-Newtonian Fluids[J]. WATER RESOURCES RESEARCH,2019,55(8):7182-7195. |
APA | Hauswirth, Scott C.,Abou Najm, Majdi R.,&Miller, Cass T..(2019).Characterization of the Pore Structure of Porous Media Using non-Newtonian Fluids.WATER RESOURCES RESEARCH,55(8),7182-7195. |
MLA | Hauswirth, Scott C.,et al."Characterization of the Pore Structure of Porous Media Using non-Newtonian Fluids".WATER RESOURCES RESEARCH 55.8(2019):7182-7195. |
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