Molecular Dynamics Simulation of Force-driven Poiseuille Gas Flow
v, 37 p.
Molecular dynamics (MD) Force-driven Poiseuille gas flow Flow peculiarities;
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Force-driven Poiseuille gas flow in the micro-channels is simulated by Molecular Dynamics (MD) simulations and the flow properties are investigated. The flow is simulated by considering Argon atoms as fluid confined to flow between the Platinum wall atoms. A constant force is applied to each fluid atom to mimic the flow down the channel. Force-driven Poiseuille gas flow finds its applications at the cooling system of microelectromechanical and nanoelectromechanical systems (MEMS and NEMS) devices. Force-driven Poiseuille gas flow have some flow peculiarities such as local temperature minimum, non-uniform pressure distribution, non-uniform stress distribution and non-negligible tangential heat flux. Some of the peculiarities of the force-driven Poiseuille gas flow is studied in this work. Previously, these flow peculiarities have been identified by analytical solutions based on a non-linear coupled constitutive relations (NCCR) theory. The results obtained by MD are compared with the results of NCCR and DSMC. The results show that there is a qualitative agreement of MD results with that of NCCR and DSMC.