摘要
ThebimodalTaylorexpansionmethodofmoments(B-TEMOM)modelschemewasdevelopedtosimulatetheformationandevolutionofvehicleexhaustparticles.Twoindependenttypesoflog-normalparticlesizedistributionswereselectedintheB-TEMOMmodelscheme,comprisinglargeandsmallparticlestorepresentbackground(i.e.,thesurroundingenvironment)andvehicleexhaustparticles,respectively.Concentrationdistributionsofexhaustandbackgroundparticlesderivedusingthismodelschemewereverifiedagainstresultsfromamovingsectionalmethodandthebimodalquadraturemethodofmoments,showingexcellentagreement.Theeffectsofvehicletailpipeex让cond让ions(e.g.,exhaustparticleconcentrationsandvelocity),sulfurcontent,andrelativehumidityontheevolutionofparticleswereinvestigatednumerically.Bothtwo-dimensionalandthree-dimensionalnumericalsimulationsshowedthattailpipeexitvelocityandrelativehumid让ydidnotgreatlyaffectthesteady-stateconcentrationsorthediametersofparticlesinurbanatmospheres.Althoughanincreaseinsulfurcontenthadlittleeffectontheparticleconcentration,itledtobackgroundparticleswithlargergeometricaveragediameterenteringtheenvironment.ThiscoupledCFD-B-TEMOMnumericalmodelprovidesasimplebutaccurateandefficientmethodforstudyingbimodalaerosoldynamics.
出版日期
2019年02月12日（中国期刊网平台首次上网日期，不代表论文的发表时间）
