简介：Tortuosityisoneofthekeyparameterstocharacterizethetransportpropertiesofporousmedia.Therearemanymodelsfortortuosityestimationbasedonsomedefinitions:geometric,hydraulic,electric,anddiffusivedefinitions.However,relationshipsamongthosetortuositiesremainunclearduetothelackofdirectcomparisononthesameporousmedia.HerewefocusonhydraulicandelectrictortuositiesandhaveconductedaseriesoffiniteelementsimulationswiththeNavier–Stokesequationandtheequationforelectriccurrenttodirectlycomparetortuosities.Theresultsrevealedthat:(1)onaverage,hydraulictortuosityis15%greaterthanthatoftheelectricone;(2)theproposedmodelbasedonthevanGenuchten-typefunctionsuccessfullyapproximatesbothhydraulicandelectrictortuosities;(3)tortuositiesobtainedfromtheporousmediapackedwithcircularparticlesandsquareparticlesshowquantitativelysimilartrends.
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