Code from Dorchester et al. (2023): Evaluation of Dual Domain Mass Transfer in Porous Media at the Pore Scale
| Authors: | |
|---|---|
| Owners: | Leland DorchesterKamini Singha |
| Type: | Resource |
| Storage: | The size of this resource is 115.1 MB |
| Created: | Jun 24, 2022 at 3:34 p.m. |
| Last updated: | Jun 08, 2023 at 4:20 a.m. |
| Citation: | See how to cite this resource |
| Sharing Status: | Public |
|---|---|
| Views: | 1347 |
| Downloads: | 32 |
| +1 Votes: | Be the first one to this. |
| Comments: | No comments (yet) |
Abstract
Dual-porosity models are often used to describe solute transport in heterogeneous media, but the parameters within these models (e.g., immobile porosity and mobile/immobile exchange rate coefficients) are difficult to identify experimentally or relate to measurable quantities. Here, we performed synthetic, pore-scale millifluidics simulations that coupled fluid flow, solute transport, and electrical resistivity (ER). A conductive-tracer test and the associated geoelectrical signatures were simulated for four flow rates in two distinct pore-scale model scenarios: one with intergranular porosity, and a second with an intragranular porosity also defined. With these models, we explore how the effective characteristic-length scale estimated from a best-fit dual domain mass transfer (DDMT) model compares to geometric aspects of the flow field. In both model scenarios we find that: (1) mobile domains and immobile domains develop even in a system that is explicitly defined with one domain; (2) the ratio of immobile to mobile porosity is larger at faster flow rates as is the mass-transfer rate; and (3) a comparison of length scales associated with the mass-transfer rate (Lα) and those associated with calculation of the Peclet number (LPe) show LPe is commonly larger than Lα. These results suggest that estimated immobile porosities from a DDMT model are not only a function of physically mobile or immobile pore space, but also are a function of the average linear pore-water velocity and physical obstructions to flow, which can drive the development of immobile porosity even in single-porosity domains.
Subject Keywords
Coverage
Spatial
Content
Related Resources
| This resource is described by | Dorchester, C., Day-Lewis, F.D., and Singha, K. (2023). Evaluation of dual-domain mass transfer in porous media at the pore scale. Groundwater DOI: 10.1111/gwat.13328 |
Credits
Funding Agencies
This resource was created using funding from the following sources:
| Agency Name | Award Title | Award Number |
|---|---|---|
| National Science Foundation | EAR-2012730 |
Contributors
People or Organizations that contributed technically, materially, financially, or provided general support for the creation of the resource's content but are not considered authors.
| Name | Organization | Address | Phone | Author Identifiers |
|---|---|---|---|---|
| Fred Day-Lewis | Pacific Northwest National Lab |
How to Cite
This resource is shared under the Creative Commons Attribution-NoCommercial CC BY-NC.
http://creativecommons.org/licenses/by-nc/4.0/
Comments
There are currently no comments
New Comment