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首页> 外文期刊>International Journal of Heat and Mass Transfer >A detailed comparison between Navier-Stokes and DSMC simulations of multicomponent gaseous flow in microchannels
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A detailed comparison between Navier-Stokes and DSMC simulations of multicomponent gaseous flow in microchannels

机译：Navier-Stokes和DSMC模拟微通道中多组分气流的详细比较

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Numerical results of the Navier-Stokes equations and the DSMC method for H_2/N_2 and H_2/N_2/CO_2 mixtures in planar microchannels are compared in order to verify the accuracy of slip/jump boundary conditions in multicomponent flows. For the solution of the Navier-Stokes and energy equations, a finite-volume method is used together with a complete set of slip/jump boundary conditions derived from the kinetic theory of gases. In order to compare the accuracy of these two methods, different wall temperatures as well as inlet mass flow rates are examined. Isothermal flow is also considered for comparison with available analytical solutions for slip flows. The Knudsen number typically ranged between 0.015 < Kn < 0.09 with a Reynolds number of 5 < Re < 15. The two methods are generally in good agreement under the conditions studied especially at low to moderate Knudsen numbers.
机译：比较了平面微通道中H_2 / N_2和H_2 / N_2 / CO_2混合物的Navier-Stokes方程和DSMC方法的数值结果，以验证多组分流中滑移/跳跃边界条件的准确性。对于Navier-Stokes和能量方程式的求解，使用了一种有限体积方法以及一整套从气体动力学理论得出的滑移/跃变边界条件。为了比较这两种方法的准确性，检查了不同的壁温以及入口质量流量。还考虑将等温流与可用的滑流分析解决方案进行比较。 Knudsen数通常在0.015

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