简介:高周波的地震变细通常被归因于有弹性的吸收。在这篇论文,我在场高周波的地震变细上的三研究并且建议物理机制源于有弹性的显微镜的多重散布波浪的干扰。首先,我在基于为波浪繁殖的基本单位是一个nano团点的概念的二阶段的媒介在波浪繁殖上建议一个新理论。由于毛孔液体和岩石框架的弹性变化,微多重散布波浪将在通过二阶段的媒介和他们的干扰的震波的波长出现,重叠将产生高周波的地震变细。第二,我在场由当模特儿的地震播送波浪的频率反应的研究与比毛孔直径没有大的厚度薄层。结果显示高周波的震波在一个近表面的水地区稍微稀释,但是在一个近表面的煤气的地区显著地腐烂。第三,我在Songliao盆用双井的射击在近表面的水和煤气的地区里分析地震变细特征,并且证明高周波的震波在水地区稍微稀释,但是在气体,宣传的1601600Hz挥动的地区显著地腐烂。来自观察与当模特儿的结果与一致的地的地震变细特征。理论上从这些研究得出的结论支持地震变细恢复。
简介:Mathematicalmodelsforpulsedfluidizationaresystematicallydiscussed.SeveralundeterminedconstitutiverelationshipsareincludedintheGeneralTwo-FluidModel(GTFM),theadjustableparametersofwhicharealwayschosenatwilltosomeextent.AlthoughtherearenoadjustableparametersintheBasicTwo-FluidModel(BTFM),itseigenvaluesarecomplexnumbersanditisill-posedforinitial-valueproblems.TheLocalEquilibriumModel(LEM),afurthersimplificationofBTFM,isdiscussedatlength.Althoughthemodelisverysimple,itishighlycapableofsimulatingcomplexprocessesinpulsedfluidizationoverabroadrangeofoperatingparameters,anditsnumericalresultswellfitexperimentalresultsinboththevariationofbedheightandthedistributionofparticleconcentrationasfluidizingvelocityvaries.
简介:Basedoncontinuummechanics,wehavedevelopedamodelforsemi-quantitativeestimatingeffectsofphasecontinuityonflowstrengthoftwo-phaserocksincludingpartiallymeltedorcrystallizedrocks.Calculationsofthebulkflowstrengthofcompositerocksasfunctionsofthevolumefraction,geometricalshapeandcontinuityoftheconstitutivephasesinvolveinnumericallysolvingtwonon-linearequationsandthusareeasytobeperformed.Themodelhasbeenjustifiedbyagoodagreementbetweenthepredictedandmeasuredresultsondiabase(64%clinopyroxeneand36%plagioclase)intherangeofexperimentaltemperaturesandstrain-rates.Itisbelievedthatthepresentmodelcouldprovideanapproximateestimatefortherheologicalevolutionofmagmaticrocksduringtheirlifecycleofmelting-crystallization-deformation.
简介:Inthispaper,thebasicequationsoftwo-phaseliquidmetalflowinamagneticfieldarede-rived,andspecifically,two-phaseliquidmetalMHDflowinarectangularchannelisstudied,andtheexpres-sionsofvelocitydistributionofliquidandgasphasesandtheratioK0ofthepressuredropintwo-phaseMHDflowtothatinsingle-phasearederived.ResultsofcalculationshowthattheratioK0issmallerthanunityanddecreaseswithincreasingvoidfractionandHartmannnumberbecausetheeffectiveelectricalconduc-tivityinthetwo-phasecasedecreases.
简介:Two-phase,immiscible,incompressibleflowinporousmediaisgovernedbyasystemofnonlinearpartialdifferentialequations.Inmostpracticalapplicationsconvectionphysicallydominatesdiffusion,andtheobjectofthispaperistodevelopafinitedifferencemethodcombinedwiththemethodofcharacteristicsandthelumpedmassmethodtotreattheparabolicequationofthedifferentialsystem.Thismethodisshownsatisfythemaximumprincipleanditserroranalysisispresented.
简介:Allexistingprotonexchangemembrane(PEM)fuelcellgasflowfieldshavebeendesignedonthebasisofsingle-phasegasflowdistribution.Thepresenceofliquidwaterintheflowcausesnon-uniformgasdistribution,leadingtopoorcellperformance.Thispaperdemonstratesthatagasflowrestrictor/distributor,asiscommonlyusedintwo-phaseflowtostabilizemultiphasetransportlinesandmultiphasereactors,canimprovethegasflowdistributionbysignificantlyreducinggasmal-distributioncausedbyeithernon-uniformwaterformationinparallelflowchannelsorflowinstabilityassociatedwithnegative-slopepressuredropcharacteristicoftwo-phasehorizontalflowsystems.
简介:Inthispaperweshallgivethecharacteristicdifferencemethodsfortwophasedisplacemeatprobleminnaturallyfracturedreservoirs.Weshallprovetheexistence,uniquenessoftheapproximatesolutionandaprioridiscreteL2-errorestimates.
简介:Twophase,miscible,incompressibleflowinporousmediaisgovernedbyasystemofnonlinearpartialdifferentialequations.Manynumericalmethodshavebeengivenbydidierentauthorstothissystem,hutthesemethodsneedveryhighregularityconditions.Actualty,inmostpracticalapplicationstheseregularityconditionscouldn'tbesatisfied.Inthispaper,theproblemofdiscontinuouscoefficientswithlowerregularityconditionsisconsideredandtheerrorestimatesaredemonstrated.
简介:Themiscibledisplacementofoneincompressiblefluidbyanotherinaporousmediumisconsideredinthispaper.Theconcentrationissplitinafirst-orderhyberbolicequationandahomogeneousparabolicequationwithineachlimestep.ThepressureandUsvelocityfieldiscomputedbyamixedfiniteelementmethod.Optimalorderestimatesarederivedforthenodiffusioncaseandthediffusioncase.
简介:Analternateyetgeneralformoftheclassicaleffectivethermalconductivitymodel(Maxwellmodel)fortwo-phaseporousmaterialsispresented,servinganexplicitthermo-physicalbasis.Itisdemonstratedthatthereducedeffectivethermalconductivityoftheporousmediaduetonon-conductingporeinclusionsiscausedbythemechanismofthermalstretching,whichisacombinationofreducedeffectiveheatflowareaandelongatedheattransferdistance(thermaltortuosity).
简介:作为在bioethanol生产的设备的一关键片,煮坦克通常被用来保证液化的一致性。在这份报纸,我们建议煮坦克保证在一个大规模过程作为伪塞子流动知道的淀粉泥浆流动的一种类型的一种新奇类型。在流动地的分析,我们使用了计算液体动力学(CFD)。模仿液体固体二阶段的流动,我们基于粒子动力学选择了一个Euler-Euler模型。我们在流动地上调查了几个关键结构的参数的效果。结果与12,800为一辆坦克显示出那?在高度的公里并且1000?在从0潰楳楴湯?瑳畲瑣牵?湡??晲捡?潭灲潨潬祧戠?的直径,优化入口试管角度和入口试管直径范围的公里?慲?楤晦慲瑣潩?攠敮杲?楤灳牥楳敶堠爭祡猠数瑣潲敭牴??卄?堠爭祡瀠潨潴汥'虪箿e数瑣潲捳灯?猠慣湮湩?汥'虪箿珱^驿麙盏?匨??琠慲獮業獳潩?汥'虪箿珱^驿麙盏??卄攠敬敭瑮污洠灡楰杮吗??
简介:ThesolutionsofGreen'sfunctionaresignificantforsimplificationofproblemonatwo-phasesaturatedmedium.UsingtransformationofaxisymmetriccylindricalcoordinateandSommerfeld'sintegral,superpositionoftheinfluencefieldonafreesurface,authorsobtainedthesolutionsofatwo-phasesaturatedmediumsubjectedtoaconcentratedforceonthesemi-space.
简介:Asecond-ordermomenttwo-phaseturbulencemodelforsimulatingdensegas-particleflows(USM-Θmodel),combiningtheunifiedsecond-ordermomenttwophaseturbulencemodelfordilutegas-particleflowswiththekinetictheoryofparticlecollision,isproposed.Theinteractionbetweengasandparticleturbulenceissimulatedusingthetransportequationoftwo-phasevelocitycorrelationwithatwo-time-scaledissipationclosure.Theproposedmodelisappliedtosimulatedensegas-particleflowsinahorizontalchannelandadowner.Simulationresultsandtheircomparisonwithexperimentalresultsshowthatthemodelaccountingforbothanisotropicparticleturbulenceandparticle-particlecollisionisobviouslybetterthanmodelsaccountingforonlyparticleturbulenceoronlyparticle-particlecollision.TheUSM-Θmodelisalsobetterthanthek-ε-kp-Θmodelandthek-ε-kp-εp-ΘmodelinthatthefirstmodelcansimulatetheredistributionofanisotropicparticleReynoldsstresscomponentsduetointer-particlecollision,whereasthesecondandthirdmodelscannot.