TY - JOUR
T1 - Extended Thermodynamic Approach for Non-Equilibrium Gas Flow
AU - G H. Tang, G. X. Zhai, W. Q. Tao, X. J. Gu & D. R. Emerson
JO - Communications in Computational Physics
VL - 5
SP - 1330
EP - 1356
PY - 2013
DA - 2013/05
SN - 13
DO - http://doi.org/10.4208/cicp.301011.180512a
UR - https://global-sci.org/intro/article_detail/cicp/7277.html
KW - 
AB - <p style="text-align: justify;">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.</p>