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随着计算机技术的快速发展,数值模拟已经成为研究分析复杂问题的重要方法,数值模拟可以打破实验手段的限制,对需要研究的参数进行更改以得到结果。由于尺度的微型化,微型通道内流体流动的实验研究受到巨大限制,本文采用计算机FLUENT模拟软件对微通道内气液两相的Taylor流动进行模拟,模拟结果与已有实验结果进行对比,验证了模型的准确性。随后改变模拟参数,得到不同因素对Taylor流动的影响结果,利用模拟计算结果拟合出预测Taylor流动过程中气泡和液柱的长度的关联式,计算机模拟比实验手段在时间和经济性方面显示出巨大优势,同时避免了常规实验操作的人为失误及不可见误差,为后续模拟计算微型通道内以及微型反应器内流体流动及传质情况奠定了基础。
With the rapid development of computer technology, numerical simulation has become an important method to study and analyze complex problems. Numerical simulation can break the limitation of experimental methods and make changes to the parameters to be studied to get the result. Due to the miniaturization of scales, the experimental study of fluid flow in microchannels is greatly restricted. In this paper, the FLUENT simulation software is used to simulate the Taylor flow of gas-liquid two-phase in microchannels. The simulation results are compared with the experimental results. The accuracy of the model. Then the simulation parameters are changed, and the influence of different factors on the Taylor flow is obtained. The correlation between the bubble length and the liquid column length in the Taylor flow process is fitted by using the simulation results. The computer simulation is more time and economic than the experimental method Huge advantage, and avoids the human error and invisible error of the routine experiment operation, which lays the foundation for the subsequent simulation calculation of the fluid flow and mass transfer in the microchannel and in the microreactor.