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首页> 外文期刊>Journal of engineering thermophysics >Waves in Liquid Film Regimes of Adiabatic Two-Phase Flow in a Slit Microchannel
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Waves in Liquid Film Regimes of Adiabatic Two-Phase Flow in a Slit Microchannel

机译：在狭缝微通道中的绝热两相流动的液体薄膜制度波

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Two-phase and two-component flows in microchannels being very promising for applications in areas such as microfluidics, microelectronic cooling, and heat exchange systems, there is a need to study characteristics of these flows and new effects associated with microchannel flows. This work presents an experimental and theoretical study of waves in stratified and annular flow regimes for a flat slit microchannel 104 mu mhigh and 10mmwide, with isopropanol used as a working liquid and nitrogen used as a gas. The lengths of waves appearing on the film on the lower wall of the microchannel were measured experimentally. Quantitative dependences of the wavelengths on the liquid and gas flow rates were obtained. A numerical calculation was performed using analysis of linear stability. The experimental data on the wavelengths were compared with the results of numerical calculations for wavelengths ofmaximum growth. Dependences of the averaged distances of transitions from 2D to 3D waves on the Reynolds numbers of the liquid and gas were obtained experimentally. Dependences of the maximum spatial rate of perturbation growth on the Reynolds numbers of the liquid and gas were found numerically and experimentally.
机译：微通道中的两相流和双组分流在微流体、微电子冷却和热交换系统等领域有着广阔的应用前景，因此有必要研究这些流的特性以及与微通道流相关的新效应。本文对104μm高、10mw宽的平缝微通道中的分层流和环形流进行了实验和理论研究，工作液为异丙醇，气体为氮气。实验测量了微通道下壁薄膜上出现的波长。得到了波长对液体和气体流量的定量依赖关系。利用线性稳定性分析进行了数值计算。对波长的实验数据与最大生长波长的数值计算结果进行了比较。实验获得了从二维波到三维波的平均跃迁距离与液体和气体雷诺数的关系。数值计算和实验发现，扰动增长的最大空间速率与液体和气体的雷诺数有关。

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