کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1688928 1011201 2014 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Asymptotic modelling of flows in microchannel by using Navier–Stokes or Burnett equations and comparison with DSMC simulations
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سطوح، پوشش‌ها و فیلم‌ها
پیش نمایش صفحه اول مقاله
Asymptotic modelling of flows in microchannel by using Navier–Stokes or Burnett equations and comparison with DSMC simulations
چکیده انگلیسی

The modelling of isothermal gas flows driven by pressure drops, in coplanar microchannels is investigated. The goal is to construct an asymptotic model deduced from Navier–Stokes or Burnett equations for this type of flow, assuming slip boundary conditions along the walls. The dimensionless balance equations are written, taking into account a geometrical parameter introduced in this study. The application of the Principle of Least Degeneracy produces models with small Mach numbers and small or moderate Knudsen numbers and allows the development of asymptotic models. The first and second approximations associated with the Navier–Stokes or Burnett equations are presented and discussed. Navier–Stokes and Burnett second approximations reduce the mass flow rates.Additionally, first asymptotic solutions as against Direct Simulation Monte Carlo (DSMC) simulations show overall satisfactory agreements.


► Asymptotic modelling of microchannel flows.
► DSMC simulations of micro-channels flows.
► Burnett equations of coplanar micro-channel flows.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vacuum - Volume 86, Issue 12, 20 July 2012, Pages 2014–2028
نویسندگان
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