Vol.5 No.3 (May 2015)
Effect of Nanochannel Properties on the Pressure of Fluid Film by Molecular Dynamics
Molecular dynamics method is applied to study the influence of potential interaction strength be-tween the liquid and the solid on the properties of fluid film in nanochannels. The results indicate: the pressure distribution of fluid film is changed in Nanochannels with the change of the height of channel in the outlet end and the liquid-solid potential interaction strength. At the same time, the jet phenomenon can occur in the outlet end. The difference of the pressure distribution between the results obtained by molecular dynamics simulation and that by NS or Renolds equation is much bigger. At this point, the jet phenomenon is more obvious. The jet velocity increases linearly as the liquid-solid potential rises. With the increasing height of the outlet, the nanoscale effect becomes weaker and weaker. The pressure profile gradually approaches to that of the macro-flow. The liquid-solid potential has no significant effect on the jet velocity.
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