TY - JOUR
T1 - Numerical Simulations of Rarefied Gases in Curved Channels: Thermal Creep, Circulating Flow, and Pumping Effect
AU - Kazuo Aoki, Pierre Degond & Luc Mieussens
JO - Communications in Computational Physics
VL - 5
SP - 919
EP - 954
PY - 2009
DA - 2009/06
SN - 6
DO - http://doi.org/
UR - https://global-sci.org/intro/article_detail/cicp/7712.html
KW - 
AB - <p style="text-align: justify;">We present numerical simulations of a new system of micro-pump based
on the thermal creep effect described by the kinetic theory of gases. This device is
made of a simple smooth and curved channel with a periodic temperature distribution.
Using the Boltzmann-BGK model as the governing equation for the gas flow, we
develop a numerical method based on a deterministic finite volume scheme, implicit
in time, with an implicit treatment of the boundary conditions. This method is comparatively
less sensitive to the slow flow velocity than the usual Direct Simulation Monte
Carlo method in case of long devices, and turns out to be accurate enough to compute
macroscopic quantities like the pressure field in the channel. Our simulations show
the ability of the device to produce a one-way flow that has a pumping effect.</p>