简介：Itpresentstheone-dimensionalunsteadydensetransportequationinthetubeforMHDpulverizedcoalfeed.ThesimplifiedfrictionalforcetermintroducedbyLiuisusedintheequation.ThenumericalsolutionhasbeengotbyusingMacCormackmethod.Theresultsshowthatthereexistsoptimalloadingrateinwhichstatevelocityisnotoscillationalongatube.Itiswellagreedwithmeasurement;italsopreventsasedimentinthetube.

简介：ＳＯＬＵＴＩＯＮＯＦＲＥＬＡＴＩＶＥＰＥＲＭＥＡＢＩＬＩＴＹＯＦＴＷＯ－ＰＨＡＳＥＦＬＯＷＩＮＰＯＲＯＵＳＭＥＤＩＵＭＬｕＹｕ－ｌｉｎ（ＩｎｓｔｉｔｕｏｆＥｎｇｉｎｅｅｒｉｎｇＭｅｃｈａｎｉｃｓ，ＤａｌｉａｎＵｎｉｖｅｒｓｉｔｙｏｆＴｅｃｈｎｏｌｏｇ...

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简介：Sphericalsymmetryconvective-dispersivetransportofatracerorcontaminantfromcontinueandsluginjectionwellinsemi-infiniteporousmediaisofsignificance,especiallyforthetracertestinhugethickformation.Thepartialequationdescribingthetransportprocessbelongstoconfluenthypergeometricequation.WithvariablesubstitutionandLaplacetransform,thepartialequationmaybecovertedWeberequationandit’ssolutionisrepresentedbyparaboliccylinderfunction.Wefoundtheanalyticalsolutionbyanalyticalinversion.Besides,wealsoobtainedtheearly-timeandlate-timeapproximatesolution.Inthepaperwecomparedthesesolutionsandinvestigatedthebasiccharacteristicsofconcentrationdistributionandchange.Inearly-timeandlate-timetheapproximatesolutionisofsignificance.

简介：ThenumericalsolutionofincompressibleviscousflowoveranaerofoilisobtainedbyH-typegridsandaspecialdifferencescheme.Themethodofmassfluxcorectionisintroducedwithsuccessinordertoaccelerateconvergenceiniterationofvelocityandpressurecalculation.

简介：Inthisstudy,asemi-analyticalformulationbasedontheScaledBoundaryFiniteElementMethod(SBFEM)wasproposedandusedtoobtainthesolutionforthecharacteristicsofatwo-dimensionaldam-reservoirsystemwithabsorptivereservoirbottominthefrequencydomain.Forsimplicity,thedamwitharbitraryupstreamfaceswasassumedtoberigidandwassubjectedtoahorizontalgroundacceleration,whilethereservoirwithabsorptivebottomwasassumedtobesemi-infinite.Thereservoirwasdividedintotwosub-domains:anear-fieldsub-domainandafar-fieldsub-domain.Thenear-fieldsub-domainwitharbitrarygeometrywasmodelledbytheFiniteElementMethod(FEM),whiletheeffectsofthefar-fieldsub-domainwhichwasassumedtobehorizontalweredescribedbyasemi-analyticalformation.Thesemi-analyticalformulationinvolvedtheeffectofabsorptivereservoirbottom,aswellastheradiationdampingeffectofasemi-infinitereservoir.AFEM/SBFEMcouplingformulationwaspresentedtosolvedam-reservoircoupledproblems.Theaccuracyandefficiencyofthecouplingformulationweredemonstratedbycomputingsomebenchmarkexamples.Highlyaccurateresultsareproducedevenifthenear-fieldsub-domainisverysmall.