Frontiers of Mechanical Engineering
>> 2009,
Volume 4,
Issue 3
doi:
10.1007/s11465-009-0037-6
Burnett simulations of gas flow and heat transfer in microchannels
College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou 310018,China
Available online: 2009-09-05
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Abstract
In micro- and nanoscale gas flows, the flow falls into the transition flow regime. There are not enough molecule collisions and the gas deviates from the equilibrium. The Navier-Stokes equations fail to describe the gas flow in this regime. The direct simulation Monte Carlo method converges slowly and requires lots of computational time. As a result, the high-order Burnett equations are used to study the gas flow and heat transfer characteristics in micro- and nanoscale gas flows in this paper. The Burnett equations are first reviewed, and the augmented Burnett equations with high-order slip boundary conditions are then used to model the gas flow and heat transfer in Couette and Poiseuille flows in the transition regime.
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