2018传热传质学年会集

，，( 规律，但其导热效果要好于Maxwell模型，分析认为是由于石墨烯独特的片层结构导致的。的广泛认同[1-11]。1995年，Choi等人[1]首次将纳米颗粒添加到流体中发现其能显著提高流体基液的换热性能。Masuda[4]Al2O3-water、SiO2-water、TiO2-water等纳米流体进行纳米流体具有更好的传热性能[7]。湘等[10]通过实验研究发现通过球磨处理过后的碳2.79%Wen等[11]0.8%浓度的碳纳米管纳米25%。的关注[12-18]。Amiri等[12]以水、乙二醇混合液为基液配制成石墨烯纳米流体，发现其在0.1%65%，Baby等[13]以去离子水为基液配50℃0.05%时，相比基液的导热系数提高了75%。Naghash等[15]0.1%水基石墨烯纳米流体的导热系数仅3.8%34%，并认为导热系数没有较大的提升可能是 ）;省教育厅重点科研项SE14301 图1石墨烯的SEM 图2石墨烯的XPS（XPS（TGAOH3SE1430450℃

3，50度下进行超声水浴，配制成不同质量浓度的水基石墨烯纳米流体[21]。并通过多功能体视显微镜（OM奥林巴斯公司）对溶液进行了简单的形，

4OM5pHpH6pHpH=2、6pHZeta电势分界线在+30mv与-30mvZeta电位高于+30v或者低于-图7-8为两种浓度溶液的Zeta电势，从图中可以看出0.01%浓度的溶液Zeta电势为-65.41mv，远低于-30mv0.1%Zeta70.01%Zeta

80.1%Zeta通过改良瞬态平面热源法[22在环境温度为26下对不同配比的石墨烯纳米流体的0.1%1.5%的提升。MeasuredMeasuredMaxwellmodelThermalconductivityratio(kThermalconductivityratio(k/kThermalThermal

图926℃时石墨烯纳米流体的导热系 图10导热系数增强实验与Maxwell模型对10模型计算结果规律相同，但是其导热系数明显高于Maxwell模型计算结果，分析认为Maxwell模型是以纳米粒子为球状的条件下所得出的，而石墨烯纳米粒子为片层结构并体，实验并测试其进行分散稳定性及导热性进试分析，并得到如下结论：3%。ChoiSUS,EastmanJA.Enhancingthermalconductivityoffluidswithnanoparticles[J].AsmeFed.1995,231(1):99-105.KeblinskiP,EastmanJA,CahillDG.Nanofluidsforthermaltransport[J].MaterialsToday.2005,8(6):36-LeeSP,ChoiS,LiS,etal.MeasuringThermalConductivityofFluidsContainingOxideNanoparticles[J].JournalofHeatTransfer.1999,121(2):280-289.MasudaH,EbataA,maeK,etal.AltionofThermalConductivityandViscosityofLiquidbySiO2andTiO2Ultra-FineParticles[J].Jp.1993,7(4):227-233.KimD,KwonY,ChoY,etal.Convectiveheattransfercharacteristicsofnanofluidsunderlaminarandturbulentflowconditions[J].CurrentAppliedPhysics.2009,9(2):e119-e123.LiuMS,LinCC,WangCC.EnhancementsofthermalconductivitieswithCu,CuO,andcarbonnanotubenanofluidsandapplicationofMWNT/waternanofluidonawaterchillersystem[J].NanoscaleResearchLetters.2011,6(1):297.ChopkarM,DasPK,MannaI.Synthesisandcharacterizationofnanofluidforadvancedheattransferapplications[J].ScriptaMaterialia.2006,55(6):549-552.CarbonNanotubesBasedNanofluids[J].JournalofPhysicalChemistryC.2008,112(25):9315.InternationalJournalofThermophysics.2004,25(4):971-985. CHANGQiangQIUJinyou,etal.ExperimentalStudyonPreparationandWenD,DingY.EffectiveThermalConductivityofAqueousSuspensionsofCarbonNanotubes(CarbonNanotubeNanofluids)[J].JournalofThermophysics&HeatTransfer.2004,18(4):481-485.pot,microwave-assistedfunctionalizationforuseasahighperformanceenginecoolant[J].EnergyConversion&Management.2015,101:767-777.BabyTT,RamaprabhuS.Enhancedconvectiveheattransferusinggraphenedispersednanofluids[J].NanoscaleResearchLetters.2011,6(1):1-9.LinY,ZhangH,HeC,etal.Anewkindofwater-basednanofluidwithalowloadingofthree-dimensionalporousgraphene[J].JournalofMaterialsScience.2017,52(17):10485-10496.NaghashA,SattariS,RashidiA.Experimentalassessmentofconvectiveheattransfercoefficientenhancementofnanofluidspreparedfromhighsurfaceareananoporousgraphene[J].InternationalCommunicationsinHeat&MassTransfer.2016,78:127-134.HaqueAKMM,KwonS,KimJ,etal.Anexperimentalstudyonthermalcharacteristicsofnanofluidwithgrapheneandmulti-wallcarbonnanotubes[J].JournalofCentralSouthUniversityofTechnology.2015,22(8):mmadM,EmadS,TahanLS,etal.Investigationofthermalconductivityandrheologicalpropertiesofnanofluidscontaininggraphenenanoets[J].NanoscaleResearchLetters.2014,9(1):15.SelvamC,LalDM,HarishS.Thermalconductivityandspecificheatcapacityofwater–ethylenemixture-basednanofluidswithgraphenenanoets[J].JournalofThermalysis&Calorimetry.2017,129(2):1-9.liquid–solidphasetransitions[J].NatureCommunications.2011,2(1):289.HarishS,IshikawaK,ChiashiS,etal.AnomalousThermalConductionCharacteristicsofPhaseChangeCompositeswithSingle-WalledCarbonNanotubeInclusions[J].J.phys.chem.c.2013,117(29):15409-15413.ParkS,