河道三維水流數(shù)值模擬.pdf

1、河海大學(xué)碩士學(xué)位論文河道三維水流數(shù)值模擬姓名：孫奇申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：水文學(xué)及水資源指導(dǎo)教師：王船海20080601英文摘要Abstract111eactualmoVementofnamralnowoftheshowisthree—dimensionalshape，toaccuratelyrenecttheoVerallnowofmet】meidenti壩muStbeinthefo咖ofnlree—dimensionalsimula

2、tionoftllemovementofwater，inordertobe批rmeettlleaCtualneedsofwaterconseⅣaIlcypr兩ectsIIltllisp印er，tIlree—dimensionalflowoftheriVersilnulationofacertainw批callbeusedtoestablishmeactualnowoftherivertllreedimensionalmatllemati

3、calmodelnisp印ercombineplaIleonhogonalcoordinate酊dofvenicalandnondimensionalcoordinates，establishathreedimensionalcomputablegrid，usingtheStaggered鰣dlayoutoftlleVariables，thecombinationofthe舭ezingprocessofmovingbouIl(1aⅨtl

4、lismethodcaIlbeeasilydealt謝thbottomlandProblems，andcanbemoreconVenientproceduresformepr印arationoftherealizationIntennsestablishedbytheⅡ鵬edimensionalconlputable鰣duIlder讓愴conditionoftl玳edimensionaldescriptionoft11ecu玎entc鋤

5、paigIlequationsa11db011ndar)，conditionsco玎esponding仃ansfo肌ation，the觚lsfo姍ationoftheequationoperatorsplit，thefirstStepbyst印equationsformeflowratecalculatem旬or，andmesecondst印_by—st印Equationsfortllewater1eVelcalculatem旬or，f

6、orCedtheequationfordiscrete，di虢rential，meconVectionitemoft：he”upwind”di艉rcntialfomlat，廿ledifmseitemoftllecenterdifrerential，alongthedirectionoft11emainstre鋤constn】ctediterativesurface，usematrixchase—aRermethodtocalculate

7、，completedathreedimensionalrivermathematicalmodelofwaternowIIltlleY觚垂ze慰VerChengTongReachtogetmodelVerification，demons位旺emep姍etersofthemodel(rouglmess，venicalturbulentViscosit)，鋤dpl鋤eturbulentViscosit)，)selectW11ichshowt