简介：在大学物理教学中用计算机和MATLAB软件开发模拟实验，能提高教学效率，激发学生学习兴趣，培养学生的创新能力。本文详细介绍了根据多普勒效应、磁场中电子的运动、和多光束干涉等三个物理问题开发出了计算机模拟实验。

简介：利用CST电磁场仿真软件研究了金属开口谐振环结构在太赫兹波段的滤波特性以及磁场分布。结果表明,开口环结构的几何参量对太赫兹滤波峰的位置及峰宽有显著影响。周期大小对共振峰频谱宽度影响较大,金属宽度变小,滤波峰会发生“红移”,开口宽度变小,滤波峰也会产生“红移”。

简介：在动态网格上通过耦合求解流动控制方程和结构动力学方程,发展了一种舵面控制下飞行器运动响应过程中气动弹性数值模拟研究方法.流动控制方程采用N-S方程,结构动力学采用线性模态叠加方法,其中流动控制方程空间离散采用基于非结构网格的有限体积方法,对流通量采用计算HLLC格式,非定常时间离散采用基于LU-SGS的双时间步长方法.模拟中,气动运动和结构变形在双时间步长方法推进过程中采用改进松耦合方法,气动网格与结构网格之间信息交换采用无限平板样条法实现,飞行器的运动和变形采用基于重叠网格和Delaunay图映射变形网格相结合的方法进行处理.采用多个考核算例对发展的数值方法进行考核验证,结果表明该方法可以高效精确模拟舵面开环控制下飞行器运动响应过程中的气动弹性特性.

简介：本文介绍在苹果型成机上，模拟南京工学院生产的ＭＯＤ—２型密立根油滴仪上所作实验的全过程，宜观方便。

简介：模拟法是通过设计与原型(自然现象或过程)相似的模型，并利用该模型来间接地研究原型的规律的方法。它随着生产和科学技术的发展而发展，是人类认识世界和改造世界的最基本方法之一。此法应用于物理教学可使事过境迁或稍纵即逝的自然现象或过程在实验窒

简介：采用Matlab软件求解简谐振动、阻尼振动与受迫振动的微分方程，通过得到的位移一时间关系，来分析不同振动方式的物理特征。

简介：NumericaltechniquesplayanimportantroleinCFD.Someofthemarereviewedinthispaper.ThenecessityofusinghighorderdifferenceschemeisdemonstratedforthestudyofhighReynoldsnumberviscousflow.Physicalguidelinesareprovidedfortheconstructionofthesehighorderschemes.Toavoidundulyadhoctreatmentintheboundaryregiontheuseofcompactschemeisrecommendedbecauseithasasmallstencilsizecomparedwiththetraditionalfinitedifferencescheme,BesidespreliminaryFourieranalysisshowsthecompactschemecanalsoyieldbetterspaceresolutionwhichmakesitmoresuitabletostudyflowwithmultiscalese.g.turbulence.Otherapproachessuchasperturbationmethodandfinitespectralmethodarealsoemphasized.Typicalnumericalsimulationswerecarriedout.ThefirstdealswithEulerequationstoshowitscapabilitiestocaptureflowdiscontinuity.TheseconddealswithNavier-Stokesequationsstudyingtheevolutionofamixinglayer,thepertinentstructuresatdifferenttimesareshown.Asymmetricbreakdownoccursandalsotheappearanceofsmallvortices.

简介：滴落状血迹是刑事案件现场常见血迹形态，是对犯罪现场重建分析的重要依据。本文通过血液滴落的模拟实验，分析测量结果，研究血液滴落的角度与高度对血迹形态的影响，并得出相应规律。通过对滴落状血迹形态的观察分析，反推血滴的出射角度，下落高度和排列的顺序，进而确定案发当时出血者的体位、姿势、朝向角度、动静关系。以期对现场重建有很大的帮助。

简介：Thispaperdevelopsahypersonicaerothermalsimulationmethodformissileslotflow.ThefinitevolumemethodofstructuregridsolverisdevelopedforsolvingEulerandNavier-Stokesequations.ThesolverincludesPark'stwotemperaturemodelandtheairmulti-speciesreactionmodel.Thesecond-orderaccuracyTVDnumericalmethodwasdeducedtocomputethehypersonicaeroheatingwhichimprovesthecomputationalefficiency.Computationalresultsaregiventoshowthehighaccuracycomparingtotheexistingexperimentaldata.

简介：NowadaysComputationalFluidDynamics(CFD)softwareisadoptedasadesignandanalysistoolinagreatnumberofengineeringfields.Wecansaythatsingle-physicsCFDhasbeensufficientlymaturedinthepracticalpointofview.ThemaintargetofexistingCFDsoftwareissingle-phaseflowssuchaswaterandair.However,manymulti-physicsproblemsexistinengineering.Mostofthemconsistofflowandotherphysics,andtheinteractionsbetweendifferentphysicsareveryimportant.Obviously,multi-physicsphenomenaarecriticalindevelopingmachinesandprocesses.Amulti-physicsphenomenonseemstobeverycomplex,anditissodifficulttobepredictedbyaddingotherphysicstoflowphenomenon.Therefore,multi-physicsCFDtechniquesarestillunderresearchanddevelopment.Thiswouldbecausedfromthefactsthatprocessingspeedofcurrentcomputersisnotfastenoughforconductingamulti-physicssimulation,andfurthermorephysicalmodelsexceptforflowphysicshavenotbeensuitablyestablished.Therefore,innearfuture,wehavetodevelopvariousphysicalmodelsandefficientCFDtechniques,inordertosuccessmulti-physicssimulationsinengineering.Inthepresentpaper,Iwilldescribethepresentstatesofmulti-physicsCFDsimulations,andthenshowsomenumericalresultssuchasiceaccretionandelectro-chemicalmachiningprocessofathree-dimensionalcompressorbladewhichwereobtainedinmylaboratory.Multi-physicsCFDsimulationswouldbeakeytechnologyinnearfuture.

简介：目前治理低浓度甲苯废气的传统方法还存在很多问题，还需研发新的治理技术，为此，进行了电子束辐照处理甲苯的动态实验。

简介：用电路分析软件Multisim2001模拟了弱电流的放大实验，该方法观察到的整个放大过程清晰明了。

简介：利用几何画板和MATLAB软件对伽耳顿板实验的小球分布直方图进行模拟,通过图形将模拟的结果直观动态地演示出来。

简介：Acombustionmodelofalarge-scalesupercriticalcirculatingfluidizedbed(CFB)boilerwasdevelopedforcomprehensivecomputational-fluid-dynamicsanalysis.Themodelincorporatesgas-solidhydrodynamics,coalcombustion,heattransferonheatexchangesurfacesinthefurnace,andheattransferbetweenfumaceandworkingmediumintheheattransfertubes.Insimulatingthedenseanddilutephasesinthefumace,thegas-solidhydrodynamicsisbasedontheEuler-Eulermodelandenergy-minimizationmultiscaledragmodel.Coalcombustionentailsevaporation,devolatilization,charcombustion,gashomogeneousreaction,andpollutantemission.Thecoefficientofheattransferbetweengas-solidandthewaterwallisestimatedusingtheclusterrenewalmodel,andforradiation,thediscreteordinatemodelisused.Moreover,thermohydraulicprocessesinthemembranewallarealsoineludedintheheattransferprocess.Themodelwassuccessfullyappliedinsimulationsofa350-MWsupercriticalCFBboiler.Detaileddistributionsofsolidsconcentration,oxygen,heatflux,andworkingmediumtemperatureintheboilerfurnacearepresented.

简介：利用几何画板程序模拟偏振光观测与研究实验中验证马吕斯定律部分,通过不同灰度显示不同光强,并动态显示不同夹角对应的光强。课件不但可以演示马吕斯实验原理,便于学生预习,学生还可以模拟测量,熟悉实验数据预计所满足的规律。同时对于师范方向学生,有利于培养学生自制课件,提高学生教学能力。

简介：为避免火工品操作带来的危险，可通过载荷发生器产生效应相似的脉冲载荷替代爆炸载荷进行实验。基于落锤实验平台，提出了一种通过液压原理产生半正弦波载荷的方法，建立了系统响应的运动方程和求解载荷压力峰值、持续时间的计算方法，指出通过减小落锤、活塞质量，减小液压缸长度，增大液压缸截面积，增大落锤初始速度等方法可以获得持续时间较短、脉冲峰值较高的半正弦波载荷。通过数值模拟对半正弦波载荷和爆炸载荷效应的相似性进行了验证。

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.

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简介：通过研究三自由度模拟支撑致稳平台的支撑方式、控制算法、平台机构的运动学仿真、分析并建立在关节空间和作动器的运动方向的速度变换关系式、建立平台的运动精度模型，为研究六自由度姿态控制技术做准备并制定控制指标。

简介：Inaclassicallayoutprocessofafanthequantityoflossesisestimatedasasumandexpressedintheoverallefficiencyrateη.Howeverthecharacteristicofthepressurerise,thelossesandtheefficiencyratebesidethedesignpointisnotknown.Againstthisbackgroundanumericalmodelwasdevelopedtocalculatequantitativevaluesofoccurringlossesatradialfanimpellersatanearlystageinthedesignprocess.Itallowstoestimatethepressureriseandefficiencyrateofagivenfangeometryatandbesidethedesignpoint.Thephysicsoflossesaredescribedinliterature,butobtainingquantitativevaluesisstillachallenge.Ascommoninhydraulictheorythelossesarecalculatedwithanalyticformulassupportedbycoefficientsandefficiencyrates,whichhavetobedeterminedempirically.Thispapershowsthemethodhowtodeterminethecoefficientsforagivenradialfan.Thereforearepresentativeradialfanwithbackwardcurvedbladeswasdesignedinreferencetoclassicaldesignguidelines.PerformancemeasuringwasdoneconformtoISO5801.Theflowwascalculatedat8differentoperationpointsusingCFDmethods.TheRANSequationsaresolvedbyusingtheSST-k-omegaturbulencemodel.Theflowdomainconsistsofonebladesectionincludinginletchannelandoutflowchamber.Spatialdiscretizationisdonebyablock-structuredmeshofapprox.1.8millioncells.Performancedatashowaverygoodagreementbetweenmeasurementandcalculation.