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Conference Paper: Effects of electro-kinetic coupling on the measurement of hydraulic conductivity

TitleEffects of electro-kinetic coupling on the measurement of hydraulic conductivity
Authors
Issue Date1994
Citation
Astm Special Technical Publication, 1994 n. 1142, p. 569-585 How to Cite?
AbstractHydraulic conductivity is the proportionality constant relating the volume flow rate of a fluid through a porous medium to the imposed hydraulic gradient. Hence, there should not be any gradient or driving force other than a hydraulic gradient imposed on the sample during the measurement of the parameter. However, no precaution is taken to prevent the development of a streaming potential during the experiment. As a result, an electrical gradient is always generated across the sample and the measured hydraulic flow volumes are actually induced by the combined hydraulic and electrical gradients. The effects of electro-kinetic coupling are more pronounced in fine-grained soil. Moreover, the measured conductivity coefficient cannot be used in coupled flow equations to quantify the hydraulic volume flow rate contributed by the hydraulic gradient without appropriate corrections. This paper attempts to present the results of the theoretical analysis and experimental evaluation of the effects of electro-kinetic coupling in the measurement of hydraulic conductivity.
Persistent Identifierhttp://hdl.handle.net/10722/152097
ISSN

 

DC FieldValueLanguage
dc.contributor.authorYeung, Albert Ten_US
dc.date.accessioned2012-06-26T06:35:10Z-
dc.date.available2012-06-26T06:35:10Z-
dc.date.issued1994en_US
dc.identifier.citationAstm Special Technical Publication, 1994 n. 1142, p. 569-585en_US
dc.identifier.issn1040-3094en_US
dc.identifier.urihttp://hdl.handle.net/10722/152097-
dc.description.abstractHydraulic conductivity is the proportionality constant relating the volume flow rate of a fluid through a porous medium to the imposed hydraulic gradient. Hence, there should not be any gradient or driving force other than a hydraulic gradient imposed on the sample during the measurement of the parameter. However, no precaution is taken to prevent the development of a streaming potential during the experiment. As a result, an electrical gradient is always generated across the sample and the measured hydraulic flow volumes are actually induced by the combined hydraulic and electrical gradients. The effects of electro-kinetic coupling are more pronounced in fine-grained soil. Moreover, the measured conductivity coefficient cannot be used in coupled flow equations to quantify the hydraulic volume flow rate contributed by the hydraulic gradient without appropriate corrections. This paper attempts to present the results of the theoretical analysis and experimental evaluation of the effects of electro-kinetic coupling in the measurement of hydraulic conductivity.en_US
dc.languageengen_US
dc.relation.ispartofASTM Special Technical Publicationen_US
dc.titleEffects of electro-kinetic coupling on the measurement of hydraulic conductivityen_US
dc.typeConference_Paperen_US
dc.identifier.emailYeung, Albert T:yeungat@hkucc.hku.hken_US
dc.identifier.authorityYeung, Albert T=rp00203en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0028587493en_US
dc.identifier.issue1142en_US
dc.identifier.spage569en_US
dc.identifier.epage585en_US
dc.identifier.scopusauthoridYeung, Albert T=7102390361en_US

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