克努森数

研究了克努森数不是特别大的微流动的稳定性，这种流动处于N-S方程适用的临界处。

Modified N-S equations have been used to study the stability of microflow with a not-too-large Knudsen number .

通过调整边界条件中的重要参数切向动量协调系数σv和热量协调系数tσ的值，可以将新建模型的应用范围扩大到克努森数Kn<1.2的稀薄气体流动中。

By adjust the momentum coefficient and thermal coefficient , the two important parameters in boundary conditions , the new model is valid as long as the Knudsen number is less than 1.2 .

比较了不同克努森数Kn对于滑移速度和跳跃温度的影响。

The influences of different Kn numbers on the slip velocity and jump temperature are investigated .

计算结果表明：采用滑移边界条件，直到克努森数为0.3，计算得到的阻力与实验都符合得很好。因此，采用BGK算法加滑移边界条件，能够模拟由连续流到近连续区的流动。

The numerical results show that the kinetic BGK with slip boundary condition can obtain the drag coefficient , which is well agreement with the experimental data till Knudsen number up to 0.3 , and can simulate the continuum-transition flow .

并对影响接触界面间隙热导的克努森数、普朗特数、热导率、适应系数、压力等参数进行了分析，为实际情况下接触界面的传热提供了理论基础。

And further the effects of Knudsen number , Prandtl number , thermal conductivity , thermal accommodation coefficient and gas pressure on the gas gap conductance are discussed , which provides the quantitatively theoretical solutions to the interfacial gap gas heat transfer in the real contact conditions .