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简介：CONFERENCETHEMESTheoverallaimoftheICHDConferenceistoprovideaforumforparticipantsfromaroundtheworldtoreview,discussandpresentthelatestdevelopmentsinthebroaddisciplineofhydrodynamicsandfluidmechanics.ThefirstInternationalConferenceonHydrodynamics（ICHD）wasinitiatedin1994inWuxi,China.Sincethen,9moreICHDconferenceswereheldsubsequentlyinHongKong,Seoul,Yokohama,Tainan,Perth,Ischia,Nantes,ShanghaiandStPetersburg.EvidentlytheICHDconferencehasbecomeanimportanteventamongacademics,researchers,engineersandoperators,workinginthefieldscloselyrelatedtothescienceandtechnologyofhydrodynamics.The1lthICHDwillbeheldinSingaporein2014.

简介：ＳＨＩＰＨＹＤＲＯＤＹＮＡＭＩＣＳＢＡＳＩＣＲＥＳＥＡＲＣＨＩＮＴＨＥＵＮＩＴＥＤＳＴＡＴＥＳ￥ＥｄｗｉｎＰ．Ｒｏｏｄ（ＭｅｃｈａｎｉｃｓａｎｄＥｎｇｅｒｇｙＣｏｎｖｅｒｓｉｏｎ（３３３），ＯｆｆｉｃｅｏｆＮａｖａｌＲｅｓｅａｒｃｈＡｒｌｉｎｇｔｏｎ...

简介：Twokindsofgaseswereusedtoinvestigatetheinfluenceofgasdensityonthehydrodynamiccharacteristicsinabubblecolumn.Itcanbefoundoutthathighergasdensityleadstosmallerbubblediameterandtheflowpatternsaredifferentforthebothgases.Energybalancemechanismsareanalyzedbyconsideringthegasdensitydifference.Modelsweredevelopedtopredicttheaveragebubblediameterwithgoodaccuracy.

简介：精确水动力学计算为半能沉入水中是批评的支持海洋资源的现代快速的探索和抽取。以便加速水动力学计算，线建模结构被分开成结构的部分然后适合到不一致的合理B花键(NURBS)。这样，鞠躬和严厉的节线被产生。部分的交叉当模特儿然后与通用建模工具MSC.Patran被做。网孔是模型上的gererated以便在关节上获得交叉的点，然后这些点被适合到NURBS。下次，补丁表示方法被采用产生弄湿的表面和内部免费表面的网孔。表面上的速度潜力独立是计算的，在不规则的频率效果在水动力学系数的计算被处理的基础上。最后，运动反应半能沉入水中被计算，并且以便改进垂直运动的计算，一个抑制术语在垂直方向被加。结果证明上述方法能产生精确地代表弄湿的表面的好网孔一半能沉入水中并且因此改进水动力学计算的精确性。

简介：Comparedtootherunderwatervehicles,supercavitatingvehiclescanattainahighspeedbecausetheyeliminatedragbycreatingalargecavity,thusestablishingtheso-called"supercavitatingcondition."Suchacavityisdifficulttodevelopundernormalconditions,hence,ventilationisusedtoattainthesupercavitatingconditionintheinitialphaseofflight.Inthispaper,wefocusonthehydrodynamiccharacteristicsofaventilatedsupercavitatingvehicle.First,dynamicmodelingofthesupercavitatingvehicleisperformedtocalculatethehydrodynamicforce/momentactingonthevehicleforagivensizeofcavity.Wethendefinetherelationshipbetweentheventilationrateandthecavitationnumberbasedonanairentrainmentmodeloftheventilatedcavity.Numericalsimulationswereperformedtoanalyzethephysicalfeasibilityandcharacteristicsofthemodeling.Theresultsshowthatthecavitylength/radiusincreaseswiththeventilationrate,provingthatventilationcanbeusedtoattainthesupercavitatingcondition.

简介：这份报纸为在放射的水动力学产生的PDE的一个系统被奉献给Cauchy问题的分析。这个系统，来自所谓的平衡散开政体，是平常的Euler方程的变体，在精力和压力functionals被修改考虑放射和包含对温度起作用的一个非线性的散开术语的精力平衡的效果的地方。这个问题在多维的框架被学习。作者识别严格地凸的熵和系统的一个稳定性性质的存在，并且检查Kawashima-Shizuta调节抓住。基于这些结构性质，然后，到一个经常的状态的well-posedness结束能被使用好精力估计证明。答案的asymptotic腐烂也被调查。

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简介：数字模拟醒来并且在轮船附近的免费表面的流动是包含多重任务的一个复杂话题：一个最佳的计算格子的产生和对有能力的数字算法的开发在壳附近预言流动域。在这份报纸，一个数字框架被开发在轮船壳附近瞄准了狂暴的、免费表面的流动的高分辨率的CFD模拟。框架在工具的并置在于，在公开源码的有限的卷图书馆OpenFOAM部分可得到?。一个新奇、灵活网孔产生算法被介绍，能够为免费表面的轮船水动力学生产高质量的计算格子。数字框架工作被用来解决一些基准问题，提供在对试验性的措施的优秀同意的结果。

简介：小粒的材料在工业并且在自然是无所不在的。为小紧张，有弹性塑料、发育不全的组成的关系广泛地在设计实践被使用，但是他们不是内在的物理的重要思考。在解释材料的物理的一个统一热力学框架下面，小粒的稳固的水动力学(GSH)是向描述小粒的材料，不是仅仅像固体，而且像液体的行为的延期。在这份报纸，GSH的基础简短被对待然后简化了在triaxial压缩分析quasistatic变丑。计算压力紧张关系和容量的紧张与试验性的结果相比。在GSH的主要参数的影响，特别他们的生气联合影响，被分析，他们的物理意思进一步被澄清。在参数被校准以后，处于典型压力状态的计算压力价值被发现在22%测试价值以内。同时，精力驱散在triaxial压缩期间被分析。上述结果支持并且部分确定GSH。

简介：Gas-solidtwo-phaseflowinacirculatingfluidizedbed(CFB)isaffectedbyoperatingconditions(e.g.,superficialgasvelocity,solidsinventory),materialpropertiesandgeometricfactors,suchastheentryandexitconfiguration.Inparticular,thesuspensionsection,whichislocatedbetweentheriserbottomandthesolidsrecycleinlet,affectsthehydrodynamicsintherisersignificantly.However,thesuspensionsectionhasreceivedlessattentioncomparedwithothergeometricfactors.Mostcomputationalfluiddynamics(CFD)simulations,especiallytwo-dimensionalsimulationsdonottakethisfactorintoaccount.Weperformedthree-dimensional,full-loopCFDsimulationswithadragcoefficientthatwasdeterminedbytheenergy-minimizationmulti-scalemodel,andinvestigatedtheflowbehavioroftwoCFBswithdifferentsuspension-sectionlengths.ThesimulationresuitsrevealedthattheaxialprofilesofvoidageintheriserwithalongersuspensionsectionaremorelikelyS-shaped,whereasthosewithshortersuspensionsectionsdecayexponentially.ThedependencesofsolidsfluxonsolidsinventorydifferinthetwoCFBs.Ashortersuspensionsectionmayresultinasmoothtransitionfromdilutetodensetransportwithoutintermediateaccumulativechoki-ng,whereasaIongersuspensionsectionmayleadtoachokingtransition.Thesesimulationresultsarequalitativelyconsistentwiththeflowbehaviorsdescribedinliterature.

简介：ThispaperextendstheSPHmethodtogassimulation.TheSPH(SmoothedParticlesHydrodynamics)methodisthemostpopularmethodofflowsimulation,whichiswidelyusedinlarge-scaleliquidsimulation.However,itisnotfoundtoapplytogassimulation,sincethosemethodsbasedonSPHcan’tbeusedinreal-timesimulationduetotheirenormousparticlesandhugecomputation.ThispaperproposesamethodforgassimulationbasedonSPHwithasmallnumberofparticles.Firstly,themethodcomputesthepositionanddensityofeachparticleineachpoint-in-time,andoutlinestheshapeofthesimulatedgasbasedonthoseparticles.Secondlythemethodusesthegridtechniquetorefinetheshapewiththediffusionofparticle’sdensityunderthecontrolofgrid,andgetmorelifelikesimulationresult.Eachgridwillbeassigneddensityaccordingtotheparticlesinit.Thedensitydeterminesthefinalappearanceofthegrid.Forensuringthenaturaltransitionofthecolorbetweenadjacentgrids,wegiveadiffuseprocessofdensitybetweenthesegridsandassignappropriatevaluestovertexesofthesegrids.Theexperimentalresultsshowthattheproposedmethodcangivebettergassimulationandmeettherequestofreal-time.

简介：Experimentalfluidizationresultswerecomparedforthreegasdistributorswiththesameopeningratiobutdifferentorificeinclinations(30,45,and90).Hydrodynamicstudieswereconductedwithglassbeads(diameter154p.m)toevaluatetheimpactsoforificeinclinationandstaticbeddepthonpressuredrop,pressuredropfluctuations,bedexpansion,andminimumfluidizationvelocity.Solidsresidencetimedistributionsweredeterminedusingphosphorescenttracerparticles(meandiameter76pm),activatedbyultravioletlight.Thebedpressuredropwashigherwiththeinclined-holedistributorsandincreasedwithstaticbedheight.Inashallowbed,theinclined-holedistributorsgavelessexpansion;however,indeepbeds,theorificeanglehadnegligibleinfluenceonbedexpansion.Theminimumfluidizationvelocityvariedwithstaticbedheightfortheinclined-holedistributorsandwashigherforsteeperangles.Theturnovertimeestimatedusingbubbling-bedequationsmatchedtheexperimentalresultswellforverticalmixing.Probesandportsatthewallsofthefluidizationcolumnreducedthedense-phasedownwardvelocitybyupto40%.Thetangentialparticlevelocitywashighestforthe30-holedistributoranddecreasedwithincreasingorificeangle.Tangentialmixingwasdescribedbyadispersionmodel;thedispersioncoefficientfortheinclined-holedistributorswasapproximatelytwicethatforthe90-holedistributorinashallowbed.

简介：为在调查的飘动的plateare附近的二维的流动的水动力学特征。在大雷纳兹数字近似下面，流动被假定是combinationof外部潜在的流动和薄旋涡层，它由边界层和shedfree组成砍层。为描述外部不稳定的potentialflow的非线性的数学明确的表达结合了一个不稳定的边界层方程为内部粘滞邻近thewaving板的流动被开发。有在thetrailing边强加的一个非线性的Kutta条件的一个半分析的方法被用来解决外部流动和进化的速度领域由一个大振幅的飘动盘子弄醒vortexinduced。不稳定的边界层方程是解决的byextendingPohlhausen“s方法到它的不稳定的对应物。戳并且粘滞拖系数，推进的效率，和模式醒来旋涡表被讨论。

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简介：(IWSH'2015,26-28August2015,Glasgow,UK)In1999,thefirstInternationalWorkshoponShipHydrodynamicswassuccessfullyheldinWuhan,China.ThenitwasheldinWuhan,Shanghai,Zhenjiang,Harbin,Seoulinsubsequenteverytwoyears.TheseConferenceshaddrawnavarietyofinternationaldelegatesincludingscientists,engineersandresearcherswithacommoninterestinshiphydrodynamics.Theyprovidedaforumtopromotescientific