| Investigation of longitudinal and transverse dispersion in stable displacements with a high viscosity and density contrast between the fluids. | |
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MedLine Citation:
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PMID: 20619925 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Transverse and longitudinal dispersion in gravity stable, favourable viscosity ratio flows are investigated and compared with earlier data obtained for miscible fluids and for tracer flow. Data from laboratory measurements of longitudinal dispersion in low viscosity ratio (8.63×10(-)(4)) and high density contrast (471kgm(-)(3)) displacements are compared with literature data for more modest viscosity ratios and density differences and with earlier theoretical analysis. The longitudinal dispersivity was reduced by a factor of 2 for flows influenced by gravity. This reduction was relatively insensitive to the magnitude of the density contrast and the flow rate, for Peclet numbers less than 100 and found to be consistent with earlier theoretical predictions. Additional transverse dispersion data was obtained for fluids with a density contrast of 225kgm(-)(3) and a matched viscosity ratio over a range of Peclet numbers (1<Pe<1000). A similar reduction in transverse dispersivity in gravity stable flow, independent of Peclet number, was observed and found to be consistent with observations in the literature for more modest density contrasts. |
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Authors:
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Abdullah Alkindi; Yahya Al-Wahaibi; Branko Bijeljic; Ann Muggeridge |
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Publication Detail:
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Type: Journal Article Date: 2010-06-23 |
Journal Detail:
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Title: Journal of contaminant hydrology Volume: 120-121 ISSN: 1873-6009 ISO Abbreviation: J. Contam. Hydrol. Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-01-17 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8805644 Medline TA: J Contam Hydrol Country: Netherlands |
Other Details:
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Languages: eng Pagination: 170-83 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 Elsevier B.V. All rights reserved. |
Affiliation:
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Imperial, College, London SW7 2AZ UK. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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