Title: Study on nanoscale obstructed flow with Molecular Dynamics Simulation method

Authors: Jie Sun, Ya-Ling He, Yin-Shi Li, Wen-Quan Tao

Addresses: School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, PR China. ' School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, PR China. ' School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, PR China. ' School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, PR China

Abstract: Obstructed flow around single cylinder and two paratactic cylinders in nanoscale were investigated in the view of discrete particles. Transient and temporal-averaged flow and density fields were obtained to analyse the wake flow. For single cylinder case, Stokes flow, steady vortex flow, periodic vortex-shedding flow with the Karman vortex street and supersonic flow were distinguished based on Re. For two paratactic cylinders case, periodic vortex-shedding flow, periodic vortex-shedding flow with gap-flow, bistable flow and synchronised vortex-shedding flow were observed with different centre-to-centre pitch ratios. Despite of some special characteristics, the results indicate most macroscopic flow patterns still exist in nanoscale.

Keywords: obstructed flow; MDS; molecular dynamics simulation; vortex street; gap flow; bistable flow; nanoscale; nanotechnology; discrete particles; wake flow.

DOI: 10.1504/PCFD.2010.030422

Progress in Computational Fluid Dynamics, An International Journal, 2010 Vol.10 No.1, pp.51 - 61

Published online: 15 Dec 2009 *

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