The pressure difference in gas–liquid Taylor flow in square microchannels with three different hydraulic diameters (190, 298, and 505 μm) were measured. Three liquids (Water and two types of glycerol-water solutions) were used as the liquid phase, and N₂ gas was used as the gas phase. The experiments were carried out for the ranges of 1.98 × 10⁻³ < Ca_T < 0.132 and 2.61 < Re_T < 661, where Ca_T and Re_T are the capillary and Reynolds numbers based on the total volumetric flux, respectively. The measured pressure drop of Taylor bubbles based on the unit cell model was compared with existing models, and large discrepancies could be recognized. Dimensionless pressure drop of a Taylor bubble increased with the capillary number, and depends on the liquid viscosity and the hydraulic diameter at the same capillary number in the middle and high capillary number region, i.e., the inertia effect. Hence, a new pressure drop model including these effects as dimensionless numbers was developed based on the relationship between the pressure drop and liquid film thickness of a Taylor bubble, and it could show good agreement with the measured data. The pressure drop of Taylor flow could also be evaluated using the unit cell model with the developed model. In addition, a pressure drop model for Taylor flow based on only the total volumetric flux was developed in terms of convenience of prediction.

在具有三种不同水力直径（190、298和505μm）的方形微通道中，测量了气液泰勒流量中的压差。三种液体（水和两种类型的甘油水溶液）用作液相，N ₂气体用作气相。在1.98×10 ^-3  <Ca _T  <0.132和2.61 <Re _T  <661的范围内进行实验，其中Ca _T和Re _T分别是基于总体积通量的毛细管数和雷诺数。将基于晶胞模型测得的泰勒气泡的压降与现有模型进行比较，可以发现较大的差异。泰勒气泡的无因次压降随毛细管数的增加而增加，并且取决于在中毛细管数和高毛细管数区域中相同毛细管数下的液体粘度和水力直径，即惯性效应。因此，基于泰勒气泡的压降和液膜厚度之间的关系，开发了一种将这些影响作为无量纲数的压降模型，该模型可以与实测数据很好地吻合。泰勒流的压降也可以使用带有已开发模型的晶胞模型进行评估。