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1、PowderTechnology196(2009)237–240ContentslistsavailableatScienceDirectPowderTechnologyjournalhomepage:www.elsevier.com/locate/powtecShortcommunicationEffectofparticleandfluidpropertiesonthepickupvelocityoffineparticlesDevangDasani,CharayCyrus,KatherineScanlon,RuiDu,Ky
2、leRupp,KimberlyH.Henthorn⁎MissouriUniversityofScienceandTechnology,Rolla,MO,UnitedStatesarticleinfoabstractArticlehistory:Systemsinvolvingfluid–particleflowsareakeycomponentofmanyindustrialprocesses,buttheyarenotReceived6April2009well-understood.Oneimportantparameter
3、toconsiderwhendesigningaconveyingsystemispickupReceivedinrevisedform21July2009velocity,theminimumfluidvelocityrequiredforparticleentrainment.ManytheoreticalandexperimentalAccepted7August2009analyseshavebeenperformedtobetterunderstandpickupvelocity,butthereislittleco
4、nsistencywithAvailableonline19August2009regardtosystemconditions,fluidproperties,andparticlecharacteristics,whichmakescomparisonsbetweenthesestudiesverydifficult.AlthoughtheproperdesignofmanyconveyingsystemsrequirestheutilizationofKeywords:Pickupvelocityexpressionsth
5、atareapplicableacrossabroadrangeofoperatingparameters,mostexpressionsaresystemEntrainmentspecific,whichmeansthattheyarenotextendabletootherconditions.Also,thereiscurrentlyanabsenceofElectrostaticforcesauniversalexpressiontopredictparticleentrainmentinbothgasesandliq
6、uids.PneumaticconveyingInthiswork,thepickupvelocityofglassspheres,crushedglass,andstainlesssteelspheresinwaterhasbeenPowdertechnologymeasuredforparticleslessthan450μm.Theeffectsofparticlesize,particleshape,andparticledensityarediscussedandcomparedtothepickupvelocit
7、ytrendspreviouslydeterminedforsimilargas-phasesystems.Inaddition,theexperimentaldataareusedtoassessanexistingforcebalancemodelpreviouslydevelopedforgas-phasesystems.©2009ElsevierB.V.Allrightsreserved.1.IntroductionPreviousworkhasexaminedtheeffectofparticlesize,shap
8、e,andelectrostaticbehavioronthepickupvelocityofparticleslessthanFluid–particleflowsarereadilyfoundinawiderangeoflarge-scale100μmingas-phasepneumat
