简介：这笔记的目的是改进H获得的整齐结果。为p液体的一个班的在2008的BeirãodaVeiga流动在一个立方的领域。关键想法关于正常的在正切的方向正在利用答案的更好的整齐，由呼吁各向异性的Sobolev嵌入钟声。

简介：TheCSCM-SalgorithmproposedbyLombardetal.isaveryattractivetoolforsolvingmultidimensionalEulerandNavier-Stokesequations.However,itisnoteconomicalduetotheuseofglobalsweepsinthewholecomputationaldomain.Inthispaperwesuggestamodifiedstrategy,whichcombinesasingle-marchingtechniqueforsupersonicdominatedregionwithamulti-sweepprocedureforpuresubsonicandcomplexflowfield.ThenewalgorithmmaysavesignificantlyCPUtimeandismoresuitableforengineeringapplications.

简介：Inthispaperaviscous-inviscidinteractingflowtheory(IFT)isdevelopedforanincompressible,two-dimensionallaminarflow.IFT’smainpointsareasfollows.(1)Byintroducingaconceptofinteractionlay-erwherethenormalmomentumexchangeisdominating,anewthreelayerstructureisestablished.(2)Throughtheconventionalmanipulationsandbyintroducinganinteractionmodel,boththestreamwiseandnormallengthscalesareprovedtobefunctionsofasingleparameterm,whichisrelatedtothestreamwisepressuregradientandReynoldsnumber.(3)Theapproximateequationsgoverningtheflowofeachlayeraswellasthewholeinteractionflowarederived.ThepresentIFTisapplicabletobothattachedandattached-separationbubble-reattachedflows,TheclassicalboundarylayertheoryandTriple-decktheoryareshowntobetwospecialcasesofthepresenttheoryunderm=0and1/4,respectively.FurthermoreIFTprovidesnewdistinctionsofboththenormalandstreamwiselengthscalesforflow-fieldnumericalcomputationandalsogivesanewapproachtodevelopingthesimpli-fiedNavier-Stokes(SNS)equations.

简介：Basedonthelinearanalysisofstability,adispersionequationisdeducedwhichdelineatestheevolutionofageneral3-dimensionaldisturbanceonthefreesurfaceofanincompressibleviscousliquidjetinjectedintoagaswithswirl.Here,thedimensionlessparameterJ_eisagainintroduced,inthemeantime,anotherdimensionlessparameterEcalledascirculationisalsointroducedtorepresenttherelativeswirlingintensity.Withrespecttothespatialgrowingdisturbancemode,thenumericalresultsobtainedfromsolvingthedispersionequationrevealthefollowingfacts.First,atthesamevalueofE,inpacewiththechangingofJ_e,thevariationofdisturbanceandthecriticaldisturbancemodestillkeepthesamecharacters.Second,thepresentresultsarethesameasthatofS.P.LinwhenJ_e>1;butintherangeofJ_e<1,it’snomorethecase,theswirldecreasestheaxisymmetricdisturbance,yetincreasestheasymmetricdisturbance,furthermoretheswirlmaymakethecharacterofthemostunstabledisturbancemodechanged(axisymmetricorasymmetric);theaboveactionoftheswirlbecomesmuchstrongerwhenJ_e《1.

简介：Effectsofdepositionlayerpositionandnumber/densityonlocalbendingofathinfilmaresystematicallyinvestigated.Becausethedepositionlayerinteractswiththethinfilmattheinterfaceandthereisanoffsetbetweenthethinfilmneutralsurfaceandtheinterface,thedepositionlayergeneratesnotonlyaxialstressbutalsobendingmoment.Thebendingmomentinducesaninstantout-of-planedeflectionofthethinfilm,whichmayormaynotcausethesocalledlocalbending.Thedepositionlayerismodeledasalocalstressor,whoselocationanddensityaredemonstratedtobevitaltotheoccurrenceoflocalbending.Thethinfilmrestsonaviscouslayer,whichisgovernedbytheNavier-Stokesequationandbehaveslikeanelasticfoundationtoexerttransverseforcesonthethinfilm.Theunknownfeatureoftheaxialconstraintforcemakesthegoverningequationhighlynonlinearevenforthesmalldeflectioncase.Theconstraintforceandfilmtransversedeflectionaresolvediterativelythroughthegoverningequationandthedisplacementconstraintequationofimmovableedges.Thisresearchshowsthatinsomespecialcases,thedepositiondensityincreasedoesnotnecessarilyreducethelocalbending.Bycomparingthethinfilmdeflectionsofdifferentdepositionnumbersandpositions,wealsopresenttheguidelineofstrengtheningorsuppressingthelocalbending.

简介：ＶＩＳＣＯＵＳ　ＳＣＡＬＥ　ＥＦＦＥＣＴＳ　ＯＮ　ＰＲＯＰＥＬＬＥＲ　ＴＩＰ　ＶＯＲＴＥＸ　ＣＡＶＩＴＡＴＩＯＮＶＩＳＣＯＵＳＳＣＡＬＥＥＦＦＥＣＴＳＯＮＰＲＯＰＥＬＬＥＲＴＩＰＶＯＲＴＥＸＣＡＶＩＴＡＴＩＯＮ￥ＹｅＹｕａｎ－ｐｅｉ；ＬｕＦａｎｇ；Ｓ...

简介：绳的一个分离模型被开发并且过去常模仿在一端修理的绳的飞机运动。实际上，二个系统被介绍，其成员是僵硬却非理想的关节包含弹性或驱散。驱散被粘滞的抑制简单地反映当模特儿，而弯曲僵硬概念为横梁和简单几何公式基于古典弯曲弯曲的时刻关系。运动的方程被导出，他们的复杂性从计算观点被讨论。自从修改扩大向后的区别，现金的公式(MEBDF)被实现解决结果起始的价值问题，技术计划被构画出。数字实验弹性被执行并且影响并且在模型的行为上抑制被分析。基本精力原则被用来验证获得的结果。

简介：Basedonthemodeltestofpoddedpropulsorinstraightforwardmotion,thepaperpresentstheresultsoftheeffectsofgeometricparametersonthepropulsivecharacteristicsofpoddedpropulsorsinviscousflow.Threemaingeometricalparameters,i.e.poddiameter,strutdistancefromthepropellerplane,andthemaximumthicknessofstrutarestudiedwithsystematicallyvariedgeometrywhiletheparametersofpropellerbladesarefixed.TheRANSapproachisadoptedtostudythesteadyperformanceusingtheFluentsoftwarepackage.Whiletheinteractionsofthepropellerbladeswiththepodandstrutaretime-dependentbynature,themixingplanemodelisemployedtopredictthesteadyperformance.Inconsiderationofthecomplexity,theresearchdoesnotdealwiththeeffectsofthecombinationofsuchthreemainparameters.

简介：Inthispaper,wepayattentiontothetime-decayrateoftheviscousbipolarquantumhydrodynamic(QHD)modelsforsemiconductors.Byapplyingtheentropymethod,weprovethatthesolutionoftheviscousbipolarQHDmodelstendstotheequilibriumstateatanexponentialdecayrateforthemulti-dimensionalcases.Theargumentsisbasedonaseriesofaprioriestimates.

简介：Ananalyticalsolutionisgivenforatime-decayRankinevortexprofileduetoviscouseffects.Thevortexfilamentisassumedtobeisolated,strong,concentratedandhavingzero-meridionalflow(i.e.radialandaxialvelocitiesareequaltozero).Zero-meridionalrendersthegoverningequationsforanunsteady,incompressibleandaxisymmetricvortexinasimpleform.Basedonthetangentialmomentumequation,thespatial-temporaldistributionsoftheswirlvelocityaregivenintermsofFourier-Besselseriesbyusingseparationofvariablestechnique.Ageneralformulaisderivedbytotaldifferentiationoftheswirlvelocitywithrespecttotime,depictingtheviscousdissipationforOseenandTaylor-likevortexprofiles.Thisanalysisisvalidatedbycomparisonwithpreviousexperimentaldata.

简介：Anefficientmulti-blockincompressibleviscousflowsolverbasedonsolvingtheReynolds-AveragedNavier-Stokes(RANS)equationsnumericallyhasbeendevelopedthatcanbeappliedtosimulationofavarietyofshipmaneuveringrelatedflowsandcalculationofhydrodynamicforces.Validationandverificationofthesolutionprocedurewerecarriedoutonseveralmodelproblemswithgoodagreementtoexperimentalandnumericalresults.

简介：近似却分析的答案粘滞Rayleigh-Taylor不稳定性(RTI)最近广泛地由于它的清澈在理论、数字的调查被使用了。在这份报纸，生长率为的一个修改分析答案粘滞不可压缩的液体的RTI基于一个近似方法被获得。它的精确性数字地被验证显著地为不同粘性比率和Atwood数字在整个波浪数字范围与以前的那比较被改善。而且，这个答案被扩展为粘滞包括集中散开效果的RTI。

简介：BasedonthedoubleFourierintegralrepresentationforsteadyviscousshipwaves,whichinvolvesagenericamplitudefunctionandacomplexdispersionrelation,thephasefunctionforthree-dimensionalshipwavesinthefarfieldwasasymptoticallyderivedbymeansoftheLighthilltwo-stageschemecombiningtheCauchyresiduetheoremandthemethodofsteepestdescents,andtheeffectofviscosityonwavelengthswasnumericallyinvestigatedwiththeNewtoniterationmethod.Itisfoundthatthetransverseanddivergingwavesareelongatedduetothepresenceofviscosityandthelatterismoreheavilyaffectedandthatthephasedifferencesbetweentheviscoustransverseanddivergingwavesarelargerthanthoseofthecorrespondinginviscidwaves.

简介：Therheologicalpropertiesofnaturaldebrisflowarestudiedusingexperimentaldataobtainedfromarheometerbuiltbytheauthors.Thepresentstudyisaimedtoaddresstherheologicalpropertiesofviscousdebrisflowatlowshearrate.Itisfoundthatoverstresseffectandshear-rate-thinningphenomenoncharacterizetheviscousdebrisflowintheJiangjiaRavine,China.Resultsobtainedfromthisstudyarebelievedtolaythefoundationforfurtherstudyonthetheoryofdebrisflowrheology.

简介：Theinflowprobleminthesupersoniccaseforaone-dimensionalcompressibleviscousgasonthehalfline(0,+∞)isinvestigated.Astabilitytheoremconcerningthelongtimebehaviourofrarefactionwaveisestablished.

简介：

简介：控告的表面上的波浪运动一粘滞牛顿的液体作为一个起始值的问题被解决。漏的电介质和完美的绝缘的盒子被考虑。波浪的振幅被假定小。表面充电导致的电场被显示在表面波浪上有通常使动摇的效果。中立稳定性曲线被收(G，Ne)飞机(G：重力的契约数字；Ne：电的邦德数字)。Ohnesorge数字，Taylor-Melcher数字和介电常数比率几乎没在中立稳定性曲线上有小影响。古典正常模式方法不能在小时间预言波浪行为，这被证明。

简介：在这篇文章，我们为当模特儿的海军司烧方程的数字答案讨论一个新完整的分离计划粘滞不可压缩的流动。这个计划用混合有限元素和曲柄由非线性的Galerkin方法组成--Nicolson方法。下次，我们提供相应于这个计划的数字答案的秒顺序集中精确性。与平常的Galerkin计划相比，这个计划能在一样的集中精确性下面节省大量计算时间。(作者摘要)8个裁判员。

简介：

简介：作者为二不可压缩的不能混合的液体学习Rayleigh-Taylor不稳定性与或没有表面紧张，与面对在Eulerian坐标的一个一致重力的领域的一个免费接口演变。为了处理免费表面，而不是使用转变到Lagrangian坐标，在Eulerian坐标的使不安的方程被转变到一张不可分的表格，二液体的流动在一个固定领域作为单个液体的流动被提出，因此提供一条其他的途径在免费接口处理jump条件。首先，在描述与分开二液体的一个免费接口超过轻的躺的更稠密的不能混合的液体的稳定的状态附近的线性化的问题，在的两液体(不稳定)平衡被分析。由学习模式的一个家庭的一个一般方法，光滑(当限制了为每液体域时)线性化的问题的答案在Sobolev空格及时变得指数地快被构造，因此为线性化的问题导致全球不稳定性结果。由使用这些病理学的答案，然后，为在适当意义的相应非线性的问题的全球不稳定性被表明。