摘要
Thegenerationandevolutionofturbulentspotsintheopen-channelflowaresimulatednumericallybyusingtheNavier-Stokesequations.Aneffectivenumericalmethodwithhighaccuracyandhighresolutionisdeveloped.Thefourth-ordertimesplittingmethodswithhighaccuracyisproposed.Three-dimensionalcouplingdifferencemethodsarepresentedforthespatialdiscretizationofthePoissonequationofpressureandHemholtzequationsofvelocity,therefore,thefourth-orderthree-dimensionalcouplingcentraldifferenceschemesareconstituted.Thefourth-orderexplicitupwind-biasedcompactdifferenceschemesaredesignedtoovercomethedifficultyforthegeneralhigher-ordercentraldifferenceschemewhichisinadaptableintheboundaryneighborhood.Theiterativealgorithmandoveralltimemarchingisusedtoenhanceefficiency.Themethodisappliedinthenumericalsimulationofturbulentspotsatvariouscomplexboundaryconditionsandflowdomains.Thegenerationandthedevelopingprocessofturbulentspotsaregiven,andthebasiccharacteristicsofturbulentspotsareshownbysimulatingtheevolutionofthewallpulseininclinedopen-channelflow.
出版日期
2005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)