Effect of wind turbulence on gas transport in porous media: experimental method and preliminary results

5.00
Hdl Handle:
http://hdl.handle.net/2436/620343
Title:
Effect of wind turbulence on gas transport in porous media: experimental method and preliminary results
Authors:
Wilkinson, Stephen ( 0000-0001-9400-4747 ) ; Pourbakhtiar, Alireza; Poulsen, Tjalfe; Bridge, Jonathan
Abstract:
Summary We demonstrate a novel experimental arrangement for measuring wind turbulence-induced gas transport in dry porous media under controlled conditions. This equipment was applied to assess the effect of wind turbulence on gas transport (quantified as a dispersion coefficient) as a function of distance to the surface of the porous medium exposed to wind. Two different strategies for the measurement of wind-induced gas transport were compared. Experiments were carried out with O2 and CO2 as tracer gases with average vertical wind speeds of 0.02–1.06ms−1. Oxygen breakthrough curves as a function of distance to the wind-exposed surface of the porous medium were analysed numerically with a finite-difference-based model to assess gas transport. We showed that wind turbulence-induced gas transport is an important transport mechanism that can be 20–70 times larger than molecular diffusion-induced transport. Wind conditions and properties of the porous medium had strong controlling effects on this relationship. Importantly, we show that even though wind-induced gas transport is greatest near to the wind-exposed surface, it can have marked effects on the variation in gas concentration at much greater depths.
Citation:
Pourbakhtiar, A., Poulsen, T. G., Wilkinson, S. and Bridge, J. W. (2017), Effect of wind turbulence on gas transport in porous media: experimental method and preliminary results. Eur J Soil Sci, 68: 48–56. doi:10.1111/ejss.12403
Publisher:
Wiley
Journal:
European Journal of Soil Science, January 2017, 68, 48-56
Issue Date:
Jan-2017
URI:
http://hdl.handle.net/2436/620343
Additional Links:
http://onlinelibrary.wiley.com/doi/10.1111/ejss.12403/full
Type:
Article
Language:
en
ISSN:
1365-2389
Appears in Collections:
Construction and Infrastructure

Full metadata record

DC FieldValue Language
dc.contributor.authorWilkinson, Stephenen
dc.contributor.authorPourbakhtiar, Alirezaen
dc.contributor.authorPoulsen, Tjalfeen
dc.contributor.authorBridge, Jonathanen
dc.date.accessioned2017-01-19T15:29:26Z-
dc.date.available2017-01-19T15:29:26Z-
dc.date.issued2017-01-
dc.identifier.citationPourbakhtiar, A., Poulsen, T. G., Wilkinson, S. and Bridge, J. W. (2017), Effect of wind turbulence on gas transport in porous media: experimental method and preliminary results. Eur J Soil Sci, 68: 48–56. doi:10.1111/ejss.12403en
dc.identifier.issn1365-2389en
dc.identifier.urihttp://hdl.handle.net/2436/620343-
dc.description.abstractSummary We demonstrate a novel experimental arrangement for measuring wind turbulence-induced gas transport in dry porous media under controlled conditions. This equipment was applied to assess the effect of wind turbulence on gas transport (quantified as a dispersion coefficient) as a function of distance to the surface of the porous medium exposed to wind. Two different strategies for the measurement of wind-induced gas transport were compared. Experiments were carried out with O2 and CO2 as tracer gases with average vertical wind speeds of 0.02–1.06ms−1. Oxygen breakthrough curves as a function of distance to the wind-exposed surface of the porous medium were analysed numerically with a finite-difference-based model to assess gas transport. We showed that wind turbulence-induced gas transport is an important transport mechanism that can be 20–70 times larger than molecular diffusion-induced transport. Wind conditions and properties of the porous medium had strong controlling effects on this relationship. Importantly, we show that even though wind-induced gas transport is greatest near to the wind-exposed surface, it can have marked effects on the variation in gas concentration at much greater depths.en
dc.language.isoenen
dc.publisherWileyen
dc.relation.urlhttp://onlinelibrary.wiley.com/doi/10.1111/ejss.12403/fullen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectatmospheric wind turbulenceen
dc.subjectgas transport in porous mediaen
dc.subjectwind-induced dispersionen
dc.titleEffect of wind turbulence on gas transport in porous media: experimental method and preliminary resultsen
dc.typeArticleen
dc.identifier.journalEuropean Journal of Soil Science, January 2017, 68, 48-56en
dc.date.accepted2016-11-
rioxxterms.funderXJTLUen
rioxxterms.identifier.projectUoW190117SWen
rioxxterms.versionVoRen
rioxxterms.licenseref.urihttps://creativecommons.org/CC BY-NC-ND 4.0en
rioxxterms.licenseref.startdate2017-01-19en
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