Title of article
Gas–liquidphasedistributionandvoidfractionmeasurementsusingMRIOriginalResearchArticle
Author/Authors
N.E.Daidzic، نويسنده , , E.Schmidt، نويسنده , , M.M.Hasan، نويسنده , , S.Altobelli، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2005
Pages
16
From page
1163
To page
1178
Abstract
Weusedapermanent-magnetmagneticresonanceimaging(MRI)systemtoestimatetheintegral,spatially-andtemporally-resolvedvoidfractiondistributionsandflowpatternsinverticalgas–liquidtwo-phaseflow.Airwasintroducedatthebottomofthestagnantliquidcolumnusinganaccurateandprogrammablesyringepump.Theairflowratewasinupwardverticaldirectionagainstthegravityvector.Airflowrateswerevariedbetween1and200ml/min.Bubbleformationanddetachmentattheinletoftheverticalcolumnwasnon-uniform.Thecylindricalnon-conductingtesttubeinwhichtwo-phaseflowischaracterizedwasplacedina0.26Tpermanent-magnetMRIunit.Aroughlylinearrelationshiphasbeenobservedfortheintegralvoidfractionversusvolumeflowrateofairthroughverticalstagnantliquidcolumn.Integralorsample-averagedvoidfractionwasobtainedbyvolume-averagingofthespatially-resolvedsignals.Spatialaveragingwasperformedinaradialorlongitudinalaxisofthecolumn.Thetime-averagedspatially-resolvedvoidfractionhasalsobeenobtainedforthequasi-steadyflowofairinastagnantliquidcolumn.Nogreataccuracyisclaimedasthiswasanexploratoryproof-of-concepttypeofexperiment.PreliminaryresultsshowthatMRIcanindeedprovidequalitativeandquantitativedataandisespeciallywellsuitedforcharacterizationofaveragedtransportprocessesinadiabaticanddiabaticmulti-phaseand/ormulti-componentflows.BetterandfasterMRIsequencescouldimprovespatialandtemporalresolutionssignificantly.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2005
Journal title
Nuclear Engineering and Design Eslah
Record number
894915
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