Research on Characteristics of Density Current Under the Action of Waves

(整期优先)网络出版时间:1997-01-11
/ 1
Inthispaper,thecharacteristicsofdensitycurrentundertheactionofwavesaredescribedwiththehelpofflumeexperimentandtheoreticalanalysis.Thestudyshowsthatturbidwaterundertheac-tionofthewavescanpresentthreetypesofmotion,i.e.significantstratification,fragilestratificationandstrongmixing.Themotionofturbidwaterpresentssignificantstratificationwhen(H/D)/△ρ/ρ1/2≤4.5,generallythisstateisknownasdensitycurrent.Theformulasofmotionvelocity,thickness,anddischargeofdensitycurrentmovingonhorizontalbottomarederivedbyuseofba-sicequationssuchasmomemtumequation,equationofenergyconservationandcontinuityequationoffluid.Thetime-averagevelocityandthethicknessofdensitycurrentundertheactionofwaveshavearela-tionshipwithsuchparametersasrelativedensity(△ρ/ρ),waveheight(H),andwaterdepth(D).Whentheseparametersaredetermined,thetime-averagethicknessandmotionvelocityofdensitycurrentareal-sodetermined.Therelat