| Toward enhanced subsurface intervention methods using chaotic advection. | |
| | |
MedLine Citation:
|
PMID: 21600670 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
Many intervention activities in the terrestrial subsurface involve the need to recover/emplace distributions of scalar quantities (e.g. dissolved phase concentrations or heat) from/in volumes of saturated porous media. These scalars can be targeted by pump-and-treat methods or by amendment technologies. Application examples include in-situ leaching for metals, recovery of dissolved contaminant plumes, or utilizing heat energy in geothermal reservoirs. While conventional pumping methods work reasonably well, costs associated with maintaining pumping schedules are high and improvements in efficiency would be welcome. In this paper we discuss how transient switching of the pressure at different wells can intimately control subsurface flow, generating a range of "programmed" flows with various beneficial characteristics. Some programs produce chaotic flows which accelerate mixing, while others create encapsulating flows which can isolate fluid zones for lengthy periods. In a simplified model of an aquifer subject to balanced pumping, chaotic flow topologies have been predicted theoretically and verified experimentally using Hele-Shaw cells. Here, a survey of the key characteristics of chaotic advection is presented. Mathematical methods are used to show how these characteristics may translate into practical situations involving regional flows and heterogeneity. The results are robust to perturbations, and withstand significant aquifer heterogeneity. It is proposed that chaotic advection may form the basis of new efficient technologies for groundwater interventions. |
| | |
Authors:
|
Michael G Trefry; Daniel R Lester; Guy Metcalfe; Alison Ord; Klaus Regenauer-Lieb |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2011-5-6 |
Journal Detail:
|
Title: Journal of contaminant hydrology Volume: - ISSN: 1873-6009 ISO Abbreviation: - Publication Date: 2011 May |
Date Detail:
|
Created Date: 2011-5-23 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 8805644 Medline TA: J Contam Hydrol Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
|
Crown Copyright © 2011. Published by Elsevier B.V. All rights reserved. |
Affiliation:
|
CSIRO Land and Water, Private Bag 5, Wembley, Western Australia 6913, Australia; Western Australian Geothermal Centre of Excellence, 26 Dick Perry Avenue, Kensington, Western Australia 6151, Australia; School of Earth and Environment, The University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Histopathological correlation of (11)C-choline PET scans for target volume definition in radical pro...
Next Document: Colonization pressure adjusted by degree of environmental contamination: A better indicator for pred...