简介：Fingeringphenomenaarecommonoccurrenceinthenaturalworld.Itgenerallytakesplacewhenalessviscousfluiddisplacesamoreviscousfluidtypicallyinporousmedia.Nowadays,suchphenomenahaveextensivelybeenstudiedduetoitsimportanceinmanyindustrialfields.Inthispaper,theeffectsofsurfacewettabilityonfingerpatternarestudiedandsimulatednumericallybytheLatticeBoltzmannmethod(LBM).Thedisplacementefficiencyisinvestigatedbyusingtwoparameters,namely,thebreakthroughtimeandthearealsweepefficiency.Thesimulationhasdemonstratedthatsurfacewettabilitywillinfluencethefingerpatternnomatterthegravityisconsideredornot,butinthepresenceofgravity,thefingerpatternismuchmorecomplicatedandirregularduetothecoexistenceandcompetitionofcapillaryforce,viscousforceandgravity.
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