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  • 简介:Inthisarticle,theinfluenceofwettabilityonaliquidflowbetweentwoparallelplanewallswerestudiedbyusingNon-EquilibriumMolecularDynamics(NEMD)simulation.Thewettabilityofthesolidsurfacescanbedescribedasthecontactangle.Theliquidflowrate,theslipvelocityandthesliplengthwhichareaffectedbythecontactanglewereinvestigated.Theresultsshowthattheboundaryconditionatamicroscopiclevelisdifferentfroma'no-slip'conditionatamacroscopiclevel.Thereexitsaslippageofaliquidflowforthehydrophobicboundaryandanexternalforceisneededtoovercomethresholdpressureforthehydrophilicboundary.Andtheorderlylayereddistributionsoftheliquidparticlesnearthehydrophilicsurfacevaryfromaplacenearthehydrophobicsurface.Thestudyindicatesthatthesurfacewettabilityplaysasignificantroleonpossibilitiesofformingaviscouslayerandthedirectslipatthesolidsurface.Theresistanceofliquidflowcanbedecreasedbychangingthewettabilityofboundarysurface.

  • 标签: 表面润湿性 POISEUILLE流 分子动力学模拟 非平衡分子动力学 液体流动 固体表面