Engineering-Research-Activity2016｜SHINSHU UNIV.

13/80

Inturbulence,three-dimensionalandtangleddisturbancesarealternatingceaselessly.OurcurrentchallengeistoelucidatecoherentstructuresinturbulentshearflowsbymeansofaMEMSmicrophonearrayandhotwireanemometrythatcancaptureastreakstructurenearthewallaswellashair-pinvortices.Inaddition,‘laminar-turbulenttransition,’whichonecanregardasembryologyofturbulence,isalsoinvestigatedusingflakeparticlesandahigh-powerlasersheet.‘Turbulence’isanold,butnewproblem.Itisoneofthemostfundamentalsubjectsthatpersistsfromthe20thcentury.Researcherallovertheworldaretryingtounderstand“turbulence”usingsupercomputersandover-100-meterwindtunnelfacilitiesintherecentyears.Inordertoapproachtheessenceofaturbulentflow,weparticipateintheinternationaljointresearchCICLoPEandwesharethegiganticpipeflowfacility.MasaharuMatsubaraProfessorPostdoctoral in KTH(Stockholm) and Tohoku Univ.The current title from 2014. His main interest is turbulence in his main resercharea, fluid dynamics.Array of MEMS micro sensors. Spanwiseintervals are 0.8 mm and a diameter of a hole is 0.5 mm. A hot wire at the left end of the array has a2.5 mm diameter sensor.Capturing ‘Coherent Structures’ in Turbulence by MEMS SensorsFlow visualization of laminar-turbulence intermittent flow. Flake-suspended water flows between glass plates apart 7 mm.Inourfluiddynamicsexperiments,wemeasuretheflowfieldsusingandcontrollingmanykindsofopticalandacousticdevicesaswellasstandardanemometers.Ourgraduateswithsuchexperiencesarehighlyactiveinthedevelopmentoffluidmachineries.MatsubaraLabIn the FutureMechanical Systems EngineeringAfter GraduationInourlaboratory,complexfluidflowswithheat/masstransferarestudiedbynumericalsimulations.Owingtorecentgreatadvanceincomputers,wehavebeenabletoinvestigateso-calledmicrofluidicswithhighaccuracy.Inparticular,thelatticeBoltzmannmethod(LBM)isapowerfulnumericalscheme,andmultiphasefluidflowssuchasbubbleflowsaresimulatedbythetwo-phaseLBM.Moreover,bloodflowsaroundcerebralaneurysmarealsostudiedascollaborativeworkwithmedicaldoctors.Inmostcompanies,acommercialsoftwareisusuallyusedforquicksolutionoffluidflowproblems.Sometimes,however,actualcomplicatedphenomenaespeciallyinthemicrofluidicsarenotaccuratelysimulatedbyacommercialsoftware.Inthefuture,wehopethatourdevelopedcodebasedontheLBMwillbecomeausefultoolforsolvingcomplicatedproblemsinmultiphasefluidflows.Dr.MasatoYoshinoProfessorBachelorEng.-1994,MasterEng.-1997,DoctorEng.-2000,KyotoUniversity.Specialty:ComputationalFluidDynamics,LatticeBoltzmannSimulationAssembling of scientific computers. Students not only select high-spec computer parts but also install compiler for computations.Numerical Simulation ofMicrofluidics (Multiphase Flow)Examples of numerical results: an osmotic phenomenon of a liquid in a porous media (upper left); a red blood cell passing through a throat (lower left); stress distribution near a cerebral aneurysm (right).Studentsinourlaboratorymainlygointovariousindustries:automobileindustry,consumer-electronicsmaker,heavyindustry,precisionequipmentmaker,andsoon.Prof.Yoshinowouldlikethemtoopenanewfrontierinmanykindsofindustriesasamechanicalengineer.YoshinoLabIn the FutureMechanical Systems EngineeringAfter Graduation11

※このページを正しく表示するにはFlashPlayer10.2以上が必要です