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采用N-S方程对长5 cm、孔径5μm的圆孔型多孔光纤通道中气体流动的流场进行了数值模拟,并利用Albertoni模型和Sreekanth模型将一阶和二阶滑移边界条件引入到计算中。通过比较有、无速度滑移两类边界条件的模拟结果,发现在滑移流域内,滑移边界条件对流场的影响最大可达10%。此外,还探讨了多孔光纤微通道流动中气体压力与速度的范围,为后续实验工作的开展打下理论基础。
N-S equation was used to numerically simulate gas flow in a 5 μm-long, 5 μm-diameter porous Porous Fiber Channel. The first and second order slip boundary conditions were introduced into the calculation using the Albertoni model and the Sreekanth model. By comparing the results of two kinds of boundary conditions with and without velocity slip, it is found that the slip boundary conditions can affect the flow field up to 10% in the slip basin. In addition, the range of gas pressure and velocity in the flow of porous optical microchannels was discussed, laying a theoretical foundation for the subsequent experimental work.