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1.
1 . INTRODUCTIONOnce peoplebrokethroughthelimitationoftraditionalecologytostudyonthestaticrelationshipbetweenbiologyanditsenvironmentandcameabouttostudythemechanismoftheirinteractioninviewofbiochemistryandenvironmentdynamics,ecosys temdynamicsgainedwide…  相似文献   

2.
1 . INTRODUCTIONThecirculatingwaterchannel (CWC)hasbeenplayinganimportantroleinhydrodynamicexperi ments,suchasshipmodeltests,oceanengineering ,sportssciences,etc .Toachievehighperformance ,itisessentialforadesignertoknowthedetailsofflowintheCWC .Becauseofthec…  相似文献   

3.
COMPLEX HEAT TRANSFER ENHANCEMENT BY FLUID INDUCED VIBRATION   总被引:3,自引:3,他引:0  
1 . INTRODUCTIONItiswellknownthatthevibrationoftheheattransfersurfacecanimproveheattransferperfor mance.Thesurfacevibrationcanstrengthenthefluidperturbance ,andthenstrengthenheattrans fer[1] .However ,peoplealwaysinducevibrationbytheouterenergy ,itcanimprove…  相似文献   

4.
1 . INTRODUCTIONCompliantsurfacesarecurrentlyfindingmanyap plicationsinengineering ,suchasthereductionofskin frictiononmovingvehicles ,thevibrationreductioninnavalvessels ,andthenoiseshieldinginsonararrays .Theconceptofusingacompliantwalltoreduceskinfricti…  相似文献   

5.
1 . INTRODUCTIONInthewesternequatorialPacificOcean ,thevigorousandcomplexcirculationischaracterizedbytheuniqueconvergenceofthesurfacecurrents,per manent,seasonalandmesoscaleeddies ,andsubsur facecurrents.Asanimportantcontributortothee quatorialandglobalmom…  相似文献   

6.
1 . INTRODUCTIONOneoftheflowconfigurationsimportantintheenvironmental processes ,withsignificantbuoyancyeffects,isaverticalnegativebuoyantjetdischargedintoastagnantenvironment .Anexampleisanindustrialdischargesuchasbrine ,whichisreleasedintotheoceanthroug…  相似文献   

7.
1 . INTRODUCTIONItisnecessarytoconductfluidflowanalysesinmanyareas ,suchasinenvironmentalandhydraulicengineering .Numericalmethodbecomesgraduallythemostimportantap proach .Thecomputationforgeneralshallowwaterflow problemsaresuccessful,butthestudiesofcomple…  相似文献   

8.
1 . INTRODUCTIONTheturbulentstructuresinnon circularductsandopenchannelsarecharacterizedbylongitudi nalvortices .Thesevorticesareth  相似文献   

9.
1 . INTRODUCTIONSyntheticApertureRadar (SAR)isanewre motesensingdetectionapproachtoenvironmentandresource .Itpossessesgoodrangeandazimuthreso lution ,thusproucingimagessimilartovisiblelightphotos.Comparedwithsuchremotesensingimagingtechniqueasoptics ,infrar…  相似文献   

10.
1 . INTRODUCTIONWhenbodymotionbecomelarge,nonlinearwavesaregeneratedandhigher orderhydrodynamicforcesappear.Thesephenomenacannotbeexplainedbylineartheorysincenonlineareffectsareessentiallyexcluded .Therefore,time domaincalculationsarenecessaryforfullynonl…  相似文献   

11.
1. INTRODUCTIONJetimpingementflowsarefrequentlyusedinindustrialpracticefortheirhighheatandmasstransferrates.Theiremploymentiscommonbutalsodiverseandtypicalapplicationsincludemanyheating,coolinganddryingprocessessuchasthemanufactureofprintedwiringboar…  相似文献   

12.
1 . INTRODUCTIONWhenhigh speedairfloworcurrentpassesovergapsorcavitiesinaflatplate ,self excitedoscillationsmayoccur ,leadingtodramaticpressureandvelocityfluctuationandintensivenoise .Thesephenomenamayappearinmanyengineeringapplications .Forexample ,weaponb…  相似文献   

13.
1 . INTRODUCTIONViscousflowpastabluffbodyhasreceivedagreatdealofattentionowingtoitstheoreticalandpracticalsignificance .Thepresenceofvortexshedding ,togetherwithvortexwakes ,isrelatedtothepressurefluctua tion ,structuralvibration ,andnoise .Thebehaviorofthef…  相似文献   

14.
1 . INTRODUCTIONRotatingflowsincylindricalcontainersthatareinducedbyrotatingboundariesareofgreatimpor tancetothedesignersoffluidmixingdevices.Withsimplegeometryandboundaries,suchtypeofflowsarestillofmuchpracticalsignificance .Therearenu merousproblemsinf…  相似文献   

15.
1 . INTRODUCTIONObjectiveofOceanFluxStudyintheShelfMar ginoftheEastChinaSeaistounderstandthevariousoceanicprocessescontrollingtheverticalfluxesofcar bonandotherbiogenicelementsandthemajorroleinhorizontalmassreplacementandredistributionplayedbytheoceanc…  相似文献   

16.
1. INTRODUCTIONThesimulationofstreamwatertemperatureissignificantlyimportantforthestudyofnumericalmodelingofrivericeprocesses[1] .Historically,themathematicalmodelingofthetransportandfateofheatinawaterbodyhasbeenthesubjectofextensivestudyforvariousre…  相似文献   

17.
1 . INTRODUCTIONMeso scaleeddiesareacommondynamicphe nomenonintheocean ,whichalsoplayanimportantroleinmeteorology .Inthemovementofatmo sphere ,theappearanceofbarragehigh pressureandinterceptivelow pressurecanproducelarge scaleed dies;likewise ,inthemovementof…  相似文献   

18.
1. INTRODUCTIONOscillatingflowsoverperiodicripplesareofpracticalaswellasscientificinterestbecauseoftheirrelevancetobeachproces...  相似文献   

19.
1 . INTRODUCTIONThediffusionequationiswidelyusedforgoverningthediffusionandattenuation processesofheatandmass.Inviewofcomputation ,thisequationreflectsthedissipativecharacteristic ,soitcanberegardedasthemodelequationofviscousflow .Inrecentyears ,thenumeric…  相似文献   

20.
1. INTRODUCTIONThemaingoalofthispaperistoexplorethepossibilitytolearnmoreaboutthemechanismofturbulentboundarylayerflowinteractionsanditseffectsoncompliantwallperformance.Therearecertainprerequisiteconditionstofurtherthestudyonthemechanism,i.e.theco…  相似文献   

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