CFD simulation of hydrodynamic characteristics in a multiple-spouted bed(PDF)

Release Time:2025-04-30  Hits:

• Date:2025-04-30
• Title of Paper:CFD simulation of hydrodynamic characteristics in a multiple-spouted bed(PDF)
• Journal:Chemical Engineering Science
• Summary:In presentwork,thegas-solidtwo-phaseflowinthemultiple-spoutedbedissimulatedbythe Eulerian–Eulerianapproach,theGidaspowdragmodelischosentodescribetheinterfacemomentum exchange.Thesimulatedresultsagreewellwiththeexperimentalresultsfromtheliterature.Thenthe detailedflowbehaviorinthemultiple-spoutedbedisinvestigatedfor1.0mm,1.4mmand1.8mm glass beads.Theeffectoftheratioofcentral/auxiliaryandauxiliary/centralgasflowonthe hydrodynamiccharacteristicsinthemultiple-spoutedbedisstudied.Thehighvelocityspoutinggas dominatestheflowpatterninthebedandrestrictsthedevelopmentofthelowvelocityspoutinggas. The distributionofvoidage,theprofileofparticlevelocityandthevariationofparticlevolume concentrationareobtained.Thefountainheightandspoutdiameterincreaseswithincreasinggasflow rate initiallyandthendecreases.Theincreasingbedthicknesshasanobviousinfluenceonthe hydrodynamicsinthebed.ForMulti-spouting,thespoutdiameterincreaseswithincreasingbedheight, howeverthebedbecomesunstablewhenthebedthicknessisincreasedto200mm.ForSingle-spouting,thefountainheightdecreaseswithincreasingbedthickness,butthefountainwidthandthe solid volumeconcentrationinthefountainincreases.Theresultsofthisstudyprovideimportant informationontheflowbehaviorwithinthemultiple-spoutedbedandmaybehelpfulforbetter applicationofthistypeofspoutedbedtotheindustrialprocess.
• Co-author:Yongchao Li,DefuChe, YinheLiu
• Volume:Vol 80
• Page Number:365-379
• Translation or Not:No
• Date of Publication:2012-10-01