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泥沙运动与环境流体力学系列学术讲座通知

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泥沙运动与环境流体力学系列学术讲座通知

NotificationsofThreeAcademicReportsonSedimentTransportandEnvironmentalFluidDynamicsØAcademicReport1Topic:High-resolutionNumericalSimulationofTurbidityCurrentsTime:October8th(Monday),14:00-15:00Location:503room,library(舟山校区图书馆503)Speaker:,SantaBarbaraInviter::Gravityandturbiditycurrentsareveryimportantphenomenoningeophysicalenvironments,,high-resolu,rfromUniversityofCalifornia,SantaBarbara(UCSB).,,hedidpostdoctoralresearchatStanfor,hestayedatUniversityofSouthCaluiddynamics,likeJournalofFluidMechanics,PhysicsofFluids,PhysicalReviewFluids,,hewasinvitedtowritethereviewpaper,TurbidityCurrentsandTheirDeposits,(APS)andAmericanSocietyofMechanicalEngineers(ASME).HeisnowthechairoftheDivisionofFluidDynamics,APSandtheAssociateEditorofPhysicalReviewFluids.ØAcademicReport2Topic:IntermittencyofSedimentTransport:FromInitiationofParticleMotiontoHighLevelsofSolidDischargesTime:October8th(Monday),15:00-16:00Location:503room,library(舟山校区图书馆503)Speaker:(石武融)fromLehighUniversityInviter::Sedimenttransporthasbeenreportedasahighlynonlinearphenomenonthatle,weidentifythecauseofvaryingexponentsatdifferenthydrodynamicconditions:ttedbythelong-termaveragingmethod,yieldinginconsistentexponovementintermittency,and,surprisingly,deriveaco,,whichsignifiestherelationshipbetweenen,fromtheonsetofsedimenttransportcondit(2017).HecurrentlyworksatLehighU,(EMI:FluidDynamicsCommittee)nceFoundationprojecttosupporthisdoctoratepursuit.ØAcademicReport3Topic:WhatisthesedimenttransportthresholdTime:October8th(Monday),16:00-17:00Location:503room,library(舟山校区图书馆503)Speaker:,ZhejiangUniversityAbstract:StandardsedimenttransportformulaepredictthatthetransportrateQv,mostaeolianandfluvialgeomorphologistsinterpretTcasanentrainmentthresholdassociatedwithanequilibriumbetweencontactforcesandforcesgeneratedbythefluidand/orparticle-bedimpacts(splash),thisinterpretationneglectsthat,whilethepredictedQvanishes,theactualQnevertrulyvanishesduetoturbulenceandthatfluvialtransportformulaetendtobecomehighly/RANSsimulationsofnon-suspendedsedimenttransportforalargerangeofNewtonianfluidsdrivingtransport,includingwind,oil,:rstressneededtocompensatetheaverageenergylossofparticlesreboundingwiththebedbythefluiddragaccelerationduringparticletrajectories(,Tcisapropertyofmean-flow-sustainedtransportandthusinsensitivetoturbulentfluctuations).stentwithmeasurementsinwind,oil,andwaterstreams(,theShieldsdiagram)ansportformula,whicho,fluidentrainmentreliesontheoccurrenceofturbulenteventsandcanthusonlysustainintermittenttransport.。

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