Marangoni效應(yīng)與其他因素對(duì)傳質(zhì)系數(shù)影響的研究.pdf

1、T象口番；、斗天津大學(xué)碩士學(xué)位論文y848310Marangoni效應(yīng)與其他因素對(duì)傳質(zhì)系數(shù)影響的研究StudyontheinfluenceofMarangonieffectandotherfactorsonthemasstransfercoefficients學(xué)科專業(yè)：化學(xué)工程研究生：周超凡指導(dǎo)教師：余國(guó)琮教授天津大學(xué)化工學(xué)院二零零五年一月ABSTRACTInthegas—liquidorliquid—liquidmasstransfe

2、rprocess，interfacialtensiongradientanddensitygradientcancreateinterfacialturbulence，bywhichthemasstransferCOC箍cientCallbeintensifiedThisinterfaciaiturbulenceiScalledMarangonieffectDuringtheprocessofthegas—liquidmasstrans

3、fertheMarangonieffectisthemainsourceofcreatinginterfacialturbulenceThepurposeofpresentstudywasintendedtoprooftheinfluenceoftheinterfacialMarangonieffectbyconductinganexperimentofdesorbing2propanol，diethyletheracetoneande

4、thanolsolutionbynitrogeninthefallingfilmprocessIftheMarangonieffectcreatesinterfacialturbulence，themasstransfercoefficientCanbeintensified，theignoranceofsucheffectwillresultinaccurateevaluationofamasstransferprocessItwas

5、foundthattheinterfacialMarangonieffecthasasignificantintensificationonthemasstransfercoefficient，theextentofwhichCanberepresentedbyintroducinganenhancementfactorFAmongthepublishedcorrelationsforpredictingthegasliquidmass

6、transfercoefficientinthefallingfilmprocess，theMarangonieffectwasalwaysbeingignoredByfittingourexperimentaldataandreferencedataanevqcorrelationofmasstransfercoefficientWasproposed，inwhichthedimensionlessSherwoodnumberShL，

7、wasexpressedasafunctionofthedimensionlessMarangoninumberMaTheevaluationoftheparametersofthenewcorrelationWaSdemonstratedTheproposedcorrelationisingoodagreementwiththeexperimentaldataandreferencedataInthisdissertation，ama

8、sstransfercoefficientdatabaseiSsetup，fromwhich鏹oconclusivestudyontheinfluenceofflowrateoftheliquid，theflowrateofthegas，physicalproperties，temperature，pressureandMarangonieffectonthemasstransferCOefficientispresentedKEYWO