界面湍動現(xiàn)象的實驗研究.pdf

1、廈門大學碩士學位論文界面湍動現(xiàn)象的實驗研究姓名：林芬芬申請學位級別：碩士專業(yè)：化學工程指導教師：沙勇20090501AbstractDuringthemasstransferprocess，theconcentrationgradientinducedbythemassdiffusionusuallycanproducethesurfacetensiongradientandthedensitygradientThesemaycause

2、theinterracialturbulenceIngeneral，theinterracialturbulenceisattributedtotheRayleighB6umrdeffectandtheMarangonieffectInthevolatilizationprocessofthebinarysystems，theconvectionstructuresoftheinterfacialturbulenceverticalan

3、dhorizontaltotheinterfacewerevisualizedbytheshadowgraphandSchlierenopticalobservationmethodsTheresultsshowthattheconvectionstructuresinducedbytheRayleighBdnardeffectandtheMarangonieffectareobviouslydifferentThemaincharac

4、teristicoftheRayleighB6nardconvectionisplume，andtheinterfacialfluidmoveslowlyanddevelopdownwardthedeepliquidThemajorsignoftheconvectionstructurecreatedbytheMarangonieffectisvortexthatexistsonlyinthevicinityoftheliquidint

5、erface，andthefluidmotioninducedbytheMarangonieffectisquitefastForbothRaylei舢6nardandMarangonisimultaneouslyunstablesystem，theconvectionstructuresareinfluencedbytheexperimentaloperatingconditions，shapesandsizesoftextboxes

6、andthicknessoftheliquidlayerWithrespecttothedifferentconditions，eithertheRayleighBgnardeffectortheMarangonieffectmaybedominant，andthedominativeonewillstronglyinfluencetheinterracialphenomenonanddecidetheshapeoftheconvect

7、ionstructureByutilizingwatermethanolandethanolasadsorbentsanddifferenttypesofthe0circleandthetrianglehelixcircleastheporouspackingmedium，themasstransferinfluencedbytheRaylei舯6nardconvectionwasstudiedbythestaticstatecarbo

8、ndioxideabsorptionexperimentTheresultsshowthattheabsorptionrateofC02usingthedifferentpackingsisenhancedsignificantlybytheRayleighB6nardconvectionandthesequenceoftheabsorptionrateis3mmx3mm0Dixonring2mmx2mm0Dixonring3mmx3m