CFD simulation of hydrodynamic characteristics in a multiple-spouted bed(PDF)
发布时间：2025-04-30
点击次数：
- 发布时间：
- 2025-04-30
- 论文名称：
- CFD simulation of hydrodynamic characteristics in a multiple-spouted bed(PDF)
- 发表刊物：
- Chemical Engineering Science
- 摘要：
- 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.
- 合写作者：
- Yongchao Li,DefuChe, YinheLiu
- 卷号：
- Vol 80
- 页面范围：
- 365-379
- 是否译文：
- 否
- 发表时间：
- 2012-10-01