CHINESE JOURNAL OF COMPUTATIONAL PHYSICS ›› 2008, Vol. 25 ›› Issue (6): 711-717.

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Molecular Behavior of Flow Around a Nano Circular Cylinder

LI Yinshi, SUN Jie, HE Yaling   

  1. State Key Lab of Multiphase Flow in Power Engineering, School of Energy & Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China
  • Received:2007-04-24 Revised:2008-02-20 Online:2008-11-25 Published:2008-11-25

Abstract: Molecular dynamics simulations are carried out to study flow of Ar around a nanoscale (Pt(FCC (100))) circular cylinder at a low Reynolds number (Re=20) with standard Lennard-Janes potential. Appearance, periodic shedding and oscillation of vortices are shown with streamlines and velocity vectors. Periodic time is about 0.3 ns and Strouhal number is about 0.2. Length of time-average vortices is 1.4 times larger than diameter of the cylinder. Velocity distribution in characteristic regions and recirculation region are obtained.

Key words: molecular dynamics simulation, flow around a circular cylinder, streamline, vortex, Reynolds number

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