Chemical Engineering and Processing - Process Intensification
巻, 号, ページ
出版年月
2021年5月
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Recentlysquare-channelpackedbedreactorswithmicrotomillidimensionsareoftenfoundintheliteratureonprocess intensification. However, its porosity profiles and resultant flow behaviors have been overlooked.Therefore,thisstudyproposestwonewCFDapproachestomodelsuchreactorsrelyingontheaccuratelocalporosityprofilesinthesquarebed.Discreteelementmethodwasemployedtomodelrandompackedbedsofmonodispersesphericalparticlesinsquarechannelswithchannel-to-particlesizeratioof3to10.Theobtainedlateralporosityprofileswereaxiallyaveragedandexpressedasafunctionofdistancefromthewallinthreedefinedzones.MomentumsourcetermtobeaddedinthemomentumconservationequationwascalculatedbasedonthelocalporosityprofilefunctionsinCorrelations-basedContinuum(CC)approach,whileontheaxially-averagedporosityprofilesinPseudo-ParticleResolved(PPR)approach.Thesquarebeds’hydrodynamicbehaviorswereinvestigatedusingCCandPPRapproaches,whichwerevalidatedwithParticleResolvedap-proachintermsofvelocityprofile,andwithempiricalcorrelationsforpressuredrop.
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