■工学部_研究紹介_2017_英語版ファイル161220

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Westudy“absorptionrefrigerators”and“icestoragesystems”forefficientuserofenergyandenergyconservation.Absorptionrefrigeratorsutilizewasteheatreducingelectricenergyconsumption.Icestoragesystemsstoreandreuseexcesselectricity.Wecanrealizeenergysavingsbythesetechnologiesthatenabletheefficientuseofenergy.Ourresearchwillhelpresolvingtoday’sseriousenvironmentalproblemssuchasenergydepletionandambientpollution.Wehavetosaveenergyandreduceemissionsofpollutantssuchasgreenhousegases.Efficientuseofenergyandenergyconservationachievedfromthetechnologiessuchasabsorptionrefrigerators,icestoragesystemsandheatpumpswillenrichourlives.TatsunoriAsaokaAssociateProfessorAreinterestedinheattransferandrefrigeration.(’13)Presentpost.(’08)DoctorEng.atTokyoTech.(’08)AssistantprofessorinAoyamaGakuinUniv.Students in our laboratory.For Efficient use of Energy and Energy ConservationAqueous solution as a refrigerant is cooled due to the evaporation under low pressure (left), and ice is formed in the solution (right).Studentsacquireengineeringskillsbyworkingonheattransferandthermalengineeringexperimentsinourlaboratory.Iexpecttheywillleadthedevelopmentofnewtechnologiesandaccomplishgreatworksinthewidefieldofengineering.AsaokaLabIn the FutureMechanical Systems EngineeringAfter GraduationAtomic bending stress [GPa]Westudydeformationmechanismsofnanometre-scalematerialsbymoleculardynamics(MD)simulations.Itisdifficulttoexploresuchnanometre-scalematerialsexperimentallyduetotheirsize([nm]=10-9[m]).MDisoneofatomicsimulationmethodsandcansimulatethemovementofeachatominamaterial.UsingMD,weperformdeformationsimulationsofvariousmaterialssuchascarbonnanotubesandbulkmetallicglassestorevealthedeformationpropertiesinatomicscales.Inthislaboratory,westudynanometre-scalematerialsusingcomputation-simulations.Carbonnanotubesandbulkmetallicglassesarenewmaterialsdiscoveredrecently.Wehavetounderstandthepropertiesofmaterialsinordertousetheminvariousproducts.Ourstudiesrevealessentialdeformationpropertiesofthesenewmaterials.Basedonourstudies,theymaybeutilizedinvariousfields.MasaomiNishimuraSenior Assistant Professor2009, Ph. D., Kobe University, Graduate School of Science and Technology. Field of study: Molecular Dynamics simulation, Solid Mechanics.We can discuss deformation mechanisms in nanometre-scale materials by computer experiment. This figure shows torsional or bending deformation analysis of a defective carbon nanotube.Solid Mechanics on Nanometre-scale Materials using Atomic SimulationsComputation-simulations reveal complex changes of atomic structure in materials. This figure shows distributions of atomic strain under the indentation simulation on bulk metallic glasses.Graduatesareworkinginbroadfieldssuchasautoandelectronicsindustries.Inthislaboratory,studentsacquirethecomputation-simulationskillandtheknowledgeinsolidmaterials,whichwillbeveryusefulinyourfuturejobs.NishimuraLabIn the FutureMechanical Systems EngineeringAfter Graduation(a) Depth = 2nm(b) Depth = 4nm(c) Depth = 5nm50nmAtomic strain, γ 0.0 0.510nm14.413.415.4Atomic shear stress [GPa]0-5050Lattice defect55

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