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1、ChemicalEngineeringScience66(2011)3268–3279ContentslistsavailableatScienceDirectChemicalEngineeringSciencejournalhomepage:www.elsevier.com/locate/cesCFDsimulationandexperimentalmeasurementofgasholdupandliquidinterstitialvelocityininternalloopairliftreactora,nb
2、abbM.Simcˇˇı´k,A.Mota,M.C.Ruzicka,A.Vicente,J.TeixeiraaInstituteofChemicalProcessFundamentals,CzechAcademyofSciences,Rozvojova135,16502Prague6,CzechRepublicbInstituteforBiotechnologyandBioengineering,CentreofBiologicalEngineering,UniversityofMinho,CampusdeGual
3、tar,4710-057Braga,PortugalarticleinfoabstractArticlehistory:ThispaperdocumentsexperimentsandCFDsimulationsofthehydrodynamicsofourtwo-phaseReceived30September2010(water,air)laboratoryinternalloopairliftreactor(40l).TheexperimentsandsimulationswereaimedReceivedi
4、nrevisedformatobtainingglobalflowcharacteristics(gasholdupandliquidinterstitialvelocityintheriserandinthe28January2011downcomer)inourparticularairliftconfigurations.TheexperimentsandsimulationsweredoneforAccepted31January2011threedifferentrisertubeswithvariablel
5、engthanddiameter.Gas(air)superficialvelocitiesinriserAvailableonline5February2011wereinrangefrom1to7.5cm/s.Uptothreecirculationregimeswereexperimentallyobserved(noKeywords:bubblesindowncomer,bubblesindowncomerbutnotcirculating,andfinallythecirculatingregime).Air
6、liftTheprimarygoalwastotestourCFDsimulationsetupusingonlystandardclosuresforinterphaseCFDforcesandturbulence,andassumingconstantbubblesizeisabletocaptureglobalcharacteristicsoftheHydrodynamicsflowforourexperimentalairliftconfigurationsforthethreecirculationregim
7、es,andifthesimulationMultiphaseflowsetupcouldbelaterusedforobtainingtheglobalcharacteristicformodifiedgeometriesofouroriginalMultiphasereactorsSimulationairliftdesignorfordifferentfluids.TheCFDsimulationsweredoneincommercialcodeFluent6.3usingalgebraicslipmixturem
8、ultiphasemodel.Thesecondarygoalwastotestthesensitivityofthesimulationresultstodifferentclosuresforthedragcoefficientandtheresultingbubbleslipvelocityandalsofortheturbulence.Inadditi
