| 3 | Extended Thermodynamic Approach for Non-Equilibrium Gas Flow显示文摘Gases in microfluidic structures or devices are often in a non-equilibrium state.The conventional thermodynamic models for fluids and heat transfer break down and the Navier-Stokes-Fourier equations are no longer accurate or valid.In this paper,the extended thermodynamic approach is employed to study the rarefied gas flow in microstructures,including the heat transfer between a parallel channel and pressure-driven Poiseuille flows through a parallel microchannel and circular microtube.The gas flow characteristics are studied and it is shown that the heat transfer in the non-equilibrium state no longer obeys the Fourier gradient transport law.In addition,the bimodal distribution of streamwise and spanwise velocity and temperature through a long circular microtube is captured for the first time. | G.H.Tang G.X.Zhai W.Q.Tao X.J.Gu D.R.Emerson | 2013 | Communications in Computational Physics2013，13，5： | 0 |
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