Theoretical and Experimental Investigation of Water Flow水流理论与实验研究 多孔陶瓷-粘土复合净水器

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1、Copyright©2009TechSciencePressFDMP,vol.5,no.4,pp.373-398,2009TheoreticalandExperimentalInvestigationofWaterFlowthroughPorousCeramicClayCompositeWaterFilterA.K.Plappally1;3,I.Yakub2:3,L.C.Brown1W.O.Soboyejo2;3andA.B.O.Soboyejo1Abstract:Waterflowthroughpoint-of-useporousceramicwatertreatme

2、ntfil-tershavebeentheoreticallyanalyzedinthistechnicalpaper.Filterstestedweremanufacturedbycombininglowcostmaterialsnamely,clayandsawdust.Threefilterswithdistinctvolumefractionsofclaytosawdust(75:25,65:35and50:50)weretested.Sinteredclayfilterscastedinfrustumshapeswerestructurallychar-acter

3、izedusingmercuryintrusionporosimetry.Alinearincreaseinporositywithvolumefractionofsawdustwasobserved.Flowexperimentswerecarriedoutatconstantroomtemperatureandpressure.Potabletapwaterwasusedinthesestudies.Flowsthroughfiltersoccurringwithdropintheheadofwaterundergravitywerestatisticallyana

4、lyzed.Dischargesthroughthefilterswerepredictedwithrespecttoindependentvariablesoftimeforcumulativedischargeandvolumefractionofsawdustusedformanufacturingthefilters.Theexperimentaldataanalysispredictsamultiplicativeinfluenceoftimeandvolumefractionofsawdustrespectively,ondischargefromthefilte

5、rs.There-sultsdemonstrateanewtheoreticalapproachforpredictionofflowinsimilartypesofheterogeneousporousmediaasdiscussedinthistechnicalpaper.Keywords:Porousceramic,volumefraction,multiplicative.Nomenclaturea,aModelCoefficientAInternalSurfaceAreaoftheFilterVesselb,bModelCoefficientGAssumedVar

6、iablehHeadofWater1TheOhioStateUniversity,Columbus,OH,U.S.A.2PrincetonUniversity,NJ,U.S.A.3PRISM,NJ,USA374Copyright©2009TechSciencePressFDMP,vol.5,no.4,pp.373-398,2009kIntrinsicPermeabilitypFluidPressureVariableQDischargetTimeVFlowVelocityX1,X2AssumedVariablePredictorsYAssumedVariableden

7、otingDischargeY¯AssumedVariableforMeanDischargeGreekSymbolskHydraulicConductivitymViscositygKinematicViscosityrDensitysStandardDeviationofLognormalModelqAngle1IntroductionWaterisabasicrequirementtosustainlifeforhumanbeingsandanimalsaroundtheworld.Thereisascarcityofpotablewateri